diff --git a/cmake/sitl.cmake b/cmake/sitl.cmake
index 9bbf9a5c2c9..1f377103246 100644
--- a/cmake/sitl.cmake
+++ b/cmake/sitl.cmake
@@ -69,7 +69,7 @@ if(NOT MACOSX)
     endif()
 else()
     set(SITL_COMPILE_OPTIONS ${SITL_COMPILE_OPTIONS}
-        -Wno-double-promotion
+        -Wno-error=double-promotion
     )
 endif()