--- a/kde-modules/KDECompilerSettings.cmake
+++ b/kde-modules/KDECompilerSettings.cmake
@@ -204,9 +204,6 @@ endif()
 ############################################################
 
 # Pick sensible versions of the C and C++ standards.
-if (NOT CMAKE_C_STANDARD)
-    set(CMAKE_C_STANDARD 90)
-endif()
 if (NOT CMAKE_CXX_STANDARD)
     set(CMAKE_CXX_STANDARD 11)
     set(CMAKE_CXX_STANDARD_REQUIRED True)