diff --git a/core/definitions.mk b/core/definitions.mk
index 3d13745dd..73d744761 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -952,7 +952,7 @@ define generate-dbus-proxies
 $(hide) $(DBUS_GENERATOR) \
 	--service-config=$(PRIVATE_DBUS_SERVICE_CONFIG) \
 	--proxy=$@ \
-	$<
+	$(filter %.dbus.xml,$^)
 endef