diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000..2fe5308674
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,5 @@
+# Mark generated protobuf code so GitHub hides it in diffs by default
+gen/** linguist-generated=true
+
+# Mark generated mocks so GitHub hides them in diffs by default
+**/mocks/mocks.go linguist-generated=true
\ No newline at end of file