diff --git a/data/skeletons/c.m4 b/data/skeletons/c.m4
index 2f774a26..2425b071 100644
--- a/data/skeletons/c.m4
+++ b/data/skeletons/c.m4
@@ -393,7 +393,7 @@ dnl use C' _Noreturn in C++, to avoid -Wc11-extensions warnings.
 # elif ((!defined __cplusplus || defined __clang__) \
         && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
             || (!defined __STRICT_ANSI__ \
-                && (__4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+                && (4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
                     || (defined __apple_build_version__ \
                         ? 6000000 <= __apple_build_version__ \
                         : 3 < __clang_major__ + (5 <= __clang_minor__))))))