diff --git a/cmake/sdlchecks.cmake b/cmake/sdlchecks.cmake
index c7b4b8887..de0059387 100644
--- a/cmake/sdlchecks.cmake
+++ b/cmake/sdlchecks.cmake
@@ -711,7 +711,6 @@ macro(CheckCOCOA)
     endif()
     if(HAVE_COCOA)
       file(GLOB COCOA_SOURCES ${SDL2_SOURCE_DIR}/src/video/cocoa/*.m)
-      set_source_files_properties(${COCOA_SOURCES} PROPERTIES LANGUAGE C)
       set(SOURCE_FILES ${SOURCE_FILES} ${COCOA_SOURCES})
       set(SDL_VIDEO_DRIVER_COCOA 1)
       set(HAVE_SDL_VIDEO TRUE)