diff --git a/cmake/language_support.cmake b/cmake/language_support.cmake
index 2f14f30b8..ddba50945 100644
--- a/cmake/language_support.cmake
+++ b/cmake/language_support.cmake
@@ -26,7 +26,7 @@ function(workaround_9220 language language_works)
     cmake_minimum_required(VERSION 2.8.0)
     set (CMAKE_Fortran_FLAGS \"${CMAKE_Fortran_FLAGS}\")
     set (CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}\")
-    enable_language(${language} OPTIONAL)
+    enable_language(${language})
   ")
   file(REMOVE_RECURSE ${CMAKE_BINARY_DIR}/language_tests/${language})
   file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/language_tests/${language})