diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 841c5e77a7..6575634bed 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -420,8 +420,23 @@ typedef struct {
 	};
 } NMPlatformIPRoute;
 
+#if _NM_CC_SUPPORT_GENERIC
+#define NM_PLATFORM_IP_ROUTE_IS_DEFAULT(route) \
+	(_Generic ((route), \
+	           const NMPlatformIPRoute  *: ((const NMPlatformIPRoute *) (route))->plen, \
+	                 NMPlatformIPRoute  *: ((const NMPlatformIPRoute *) (route))->plen, \
+	           const NMPlatformIPXRoute *: ((const NMPlatformIPRoute *) (route))->plen, \
+	                 NMPlatformIPXRoute *: ((const NMPlatformIPRoute *) (route))->plen, \
+	           const NMPlatformIP4Route *: ((const NMPlatformIPRoute *) (route))->plen, \
+	                 NMPlatformIP4Route *: ((const NMPlatformIPRoute *) (route))->plen, \
+	           const NMPlatformIP6Route *: ((const NMPlatformIPRoute *) (route))->plen, \
+	                 NMPlatformIP6Route *: ((const NMPlatformIPRoute *) (route))->plen, \
+	           const void               *: ((const NMPlatformIPRoute *) (route))->plen, \
+	                 void               *: ((const NMPlatformIPRoute *) (route))->plen) == 0)
+#else
 #define NM_PLATFORM_IP_ROUTE_IS_DEFAULT(route) \
 	( ((const NMPlatformIPRoute *) (route))->plen <= 0 )
+#endif
 
 struct _NMPlatformIP4Route {
 	__NMPlatformIPRoute_COMMON;