diff --git a/ctest.c b/ctest.c
index 5e869b901..cd84ab1bb 100644
--- a/ctest.c
+++ b/ctest.c
@@ -153,3 +153,6 @@ ARCH_ARM
 ARCH_ARM64
 #endif
 
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
+HAVE_C11
+#endif