diff --git a/cmake/flags.cmake b/cmake/flags.cmake
index cf4aef71bfc1ce4d02a36d6a49c47344282593e5..fd1c2c3838f8238f957aed5fc7adeef97aeaa692 100644
--- a/cmake/flags.cmake
+++ b/cmake/flags.cmake
@@ -148,7 +148,7 @@ if(LINUX)
         -Wextra
         -Werror
         ${GPU_COMMON_FLAGS})
-endif()
+endif(LINUX)
 
 if(UNIX AND NOT APPLE)
   # except apple from nix*Os family