diff --git a/butane/config/fcos/v1_3/translate.go b/butane/config/fcos/v1_3/translate.go
index dce129640..bc17d347a 100644
--- a/butane/config/fcos/v1_3/translate.go
+++ b/butane/config/fcos/v1_3/translate.go
@@ -75,10 +75,7 @@ func (c Config) ToIgn3_2Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_3/translate_test.go b/butane/config/fcos/v1_3/translate_test.go
index f83842b92..da147e280 100644
--- a/butane/config/fcos/v1_3/translate_test.go
+++ b/butane/config/fcos/v1_3/translate_test.go
@@ -1652,6 +1652,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/config/fcos/v1_4/translate.go b/butane/config/fcos/v1_4/translate.go
index 10f6885ef..357b326f0 100644
--- a/butane/config/fcos/v1_4/translate.go
+++ b/butane/config/fcos/v1_4/translate.go
@@ -75,10 +75,7 @@ func (c Config) ToIgn3_3Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_4/translate_test.go b/butane/config/fcos/v1_4/translate_test.go
index 5dcf332a1..6ee9f27ef 100644
--- a/butane/config/fcos/v1_4/translate_test.go
+++ b/butane/config/fcos/v1_4/translate_test.go
@@ -1652,6 +1652,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/config/fcos/v1_5/translate.go b/butane/config/fcos/v1_5/translate.go
index 973432577..c2ee380ca 100644
--- a/butane/config/fcos/v1_5/translate.go
+++ b/butane/config/fcos/v1_5/translate.go
@@ -76,10 +76,7 @@ func (c Config) ToIgn3_4Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_5/translate_test.go b/butane/config/fcos/v1_5/translate_test.go
index 88a277381..179ec0c88 100644
--- a/butane/config/fcos/v1_5/translate_test.go
+++ b/butane/config/fcos/v1_5/translate_test.go
@@ -1734,6 +1734,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/config/fcos/v1_6/translate.go b/butane/config/fcos/v1_6/translate.go
index 504c25441..ff0d40368 100644
--- a/butane/config/fcos/v1_6/translate.go
+++ b/butane/config/fcos/v1_6/translate.go
@@ -76,10 +76,7 @@ func (c Config) ToIgn3_5Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_6/translate_test.go b/butane/config/fcos/v1_6/translate_test.go
index 1891f254d..0816aa5ec 100644
--- a/butane/config/fcos/v1_6/translate_test.go
+++ b/butane/config/fcos/v1_6/translate_test.go
@@ -1734,6 +1734,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/config/fcos/v1_7/translate.go b/butane/config/fcos/v1_7/translate.go
index 51d50e86d..e5034f49f 100644
--- a/butane/config/fcos/v1_7/translate.go
+++ b/butane/config/fcos/v1_7/translate.go
@@ -76,10 +76,7 @@ func (c Config) ToIgn3_6Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_7/translate_test.go b/butane/config/fcos/v1_7/translate_test.go
index 8b35f70b4..c79f37d98 100644
--- a/butane/config/fcos/v1_7/translate_test.go
+++ b/butane/config/fcos/v1_7/translate_test.go
@@ -1735,6 +1735,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/config/fcos/v1_8_exp/translate.go b/butane/config/fcos/v1_8_exp/translate.go
index bdbc202e8..bf99eaf2c 100644
--- a/butane/config/fcos/v1_8_exp/translate.go
+++ b/butane/config/fcos/v1_8_exp/translate.go
@@ -76,10 +76,7 @@ func (c Config) ToIgn3_7Unvalidated(options common.TranslateOptions) (types.Conf
 			if partition.Label != nil {
 				if *partition.Label == "root" {
 					if partition.SizeMiB == nil || *partition.SizeMiB == 0 {
-						for idx := range disk.Partitions {
-							if idx == p {
-								continue
-							}
+						for idx := p + 1; idx < len(disk.Partitions); idx++ {
 							if disk.Partitions[idx].StartMiB == nil || *disk.Partitions[idx].StartMiB == 0 {
 								r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", p, "label"), common.ErrRootConstrained)
 								break
diff --git a/butane/config/fcos/v1_8_exp/translate_test.go b/butane/config/fcos/v1_8_exp/translate_test.go
index fceab29d9..916d5aa34 100644
--- a/butane/config/fcos/v1_8_exp/translate_test.go
+++ b/butane/config/fcos/v1_8_exp/translate_test.go
@@ -1881,6 +1881,37 @@ func TestRootPartitionConstraints(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "root last with sized partitions before",
+			in: Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "/dev/vda",
+								Partitions: []base.Partition{
+									{
+										Label:   util.StrToPtr("bios"),
+										Number:  1,
+										SizeMiB: util.IntToPtr(1),
+									},
+									{
+										Label:   util.StrToPtr("boot"),
+										Number:  3,
+										SizeMiB: util.IntToPtr(2048),
+									},
+									{
+										Label:  util.StrToPtr("root"),
+										Number: 4,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			report: report.Report{}, // no warning expected
+		},
 	}
 
 	for _, test := range tests {
diff --git a/butane/docs/release-notes.md b/butane/docs/release-notes.md
index 8306efae5..bc9cec68d 100644
--- a/butane/docs/release-notes.md
+++ b/butane/docs/release-notes.md
@@ -21,6 +21,7 @@ Butane 0.29.0 is the last release from this standalone repository. Butane has be
 
 ### Bug fixes
 
+
 ### Misc. changes
 
 - Add support for pretty error reporting, can be controlled through
diff --git a/docs/release-notes.md b/docs/release-notes.md
index b9020a1e8..a6f6b0206 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -19,6 +19,7 @@ nav_order: 9
 
 ### Bug fixes
 
+- fix butane root partition constraint check to only examine subsequent partitions
 
 ## Upcoming Ignition 2.27.0 (unreleased)