diff --git a/bellows/zigbee/application.py b/bellows/zigbee/application.py
index 1bd0271c..f64254ac 100644
--- a/bellows/zigbee/application.py
+++ b/bellows/zigbee/application.py
@@ -1042,8 +1042,8 @@ async def send_packet(self, packet: zigpy.types.ZigbeePacket) -> None:
                                 ]
                             ):
                                 await self._ezsp.xncp_set_manual_source_route(
-                                    nwk=packet.dst.address,
-                                    relays=packet.source_route,
+                                    destination=packet.dst.address,
+                                    route=packet.source_route,
                                 )
                             else:
                                 await self._ezsp.set_source_route(
diff --git a/tests/test_application.py b/tests/test_application.py
index 018dd632..9170747b 100644
--- a/tests/test_application.py
+++ b/tests/test_application.py
@@ -899,7 +899,7 @@ async def test_send_packet_unicast_manual_source_route(make_app, packet):
     app._ezsp._xncp_features |= FirmwareFeatures.MANUAL_SOURCE_ROUTE
 
     app._ezsp.xncp_set_manual_source_route = AsyncMock(
-        return_value=None, spec=app._ezsp._protocol.set_source_route
+        return_value=None, spec=app._ezsp.xncp_set_manual_source_route
     )
 
     packet.source_route = [0x0001, 0x0002]
@@ -913,8 +913,8 @@ async def test_send_packet_unicast_manual_source_route(make_app, packet):
     )
 
     app._ezsp.xncp_set_manual_source_route.assert_called_once_with(
-        nwk=packet.dst.address,
-        relays=[0x0001, 0x0002],
+        destination=packet.dst.address,
+        route=[0x0001, 0x0002],
     )