diff --git a/contrib/ports/CMakeCommon.cmake b/contrib/ports/CMakeCommon.cmake
index 90735114..da80512b 100644
--- a/contrib/ports/CMakeCommon.cmake
+++ b/contrib/ports/CMakeCommon.cmake
@@ -40,7 +40,8 @@ set(LWIP_COMPILER_FLAGS_GNU_CLANG
     -Wparentheses
     -Wsequence-point
     -Wswitch-default
-    -Wextra -Wundef
+    -Wextra
+    -Wundef
     -Wshadow
     -Wpointer-arith
     -Wcast-qual