Index: plugins/cmake/CMakeLists.txt
--- plugins/cmake/CMakeLists.txt.orig
+++ plugins/cmake/CMakeLists.txt
@@ -85,6 +85,10 @@ endif()
 kconfig_add_kcfg_files( cmakecommon_SRCS cmakebuilderconfig.kcfgc )
 ki18n_wrap_ui( cmakecommon_SRCS ${cmakecommon_UI} )
 kdevelop_add_private_library(KDevCMakeCommon SOURCES ${cmakecommon_SRCS})
+set_target_properties(KDevCMakeCommon PROPERTIES
+    C_STANDARD 11
+    C_STANDARD_REQUIRED ON
+)
 target_link_libraries(KDevCMakeCommon
     PUBLIC
         kdevmakefileresolver
