diff --git a/cmake/maintainer.cmake b/cmake/maintainer.cmake
index cbfdab4413f..a728925721a 100644
--- a/cmake/maintainer.cmake
+++ b/cmake/maintainer.cmake
@@ -39,12 +39,12 @@ SET(MY_WARNING_FLAGS
   -Wsuggest-override
   -Wvla
   -Wwrite-strings
+  -Wcast-function-type-strict
   )
 
 # Warning flags that are in testing before moving
 # to MY_WARNING_FLAGS if stable.
 SET(MY_WARNING_FLAGS_NON_FATAL
-  cast-function-type-strict
   )
 
 FOREACH(F ${MY_WARNING_FLAGS})