diff --git a/gcc/c-family/c-cppbuiltin.cc b/gcc/c-family/c-cppbuiltin.cc
index 73a07055a86..b37a4c09792 100644
--- a/gcc/c-family/c-cppbuiltin.cc
+++ b/gcc/c-family/c-cppbuiltin.cc
@@ -1102,7 +1102,7 @@ c_cpp_builtins (cpp_reader *pfile)
 	  cpp_define (pfile, "__cpp_deleted_function=202403L");
 	  cpp_define (pfile, "__cpp_variadic_friend=202403L");
 	}
-      if (flag_concepts)
+      if (flag_concepts && cxx_dialect > cxx14)
 	cpp_define (pfile, "__cpp_concepts=202002L");
       if (flag_contracts)
 	{