@@ -120,17 +120,13 @@
 		fprintf(stderr, "Failed to ensure condition in "	\
 		    __FILE__ ":%d:\n" #cond "\n", __LINE__);		\
 		abort();						\
 	}
 
-#if __STDC_VERSION__ >= 201112L
-# /* C11 compiler, but old libc */
-# ifndef static_assert
-#  define static_assert _Static_assert
-# endif
-#else
-# define static_assert assert
+#if __STDC_VERSION__ >= 201112L && !defined(static_assert)
+/* C11 compiler, but old libc */
+# define static_assert _Static_assert
 #endif
 
 #if !defined(_WIN32) && !defined(__DJGPP__)
 # define OF_PATH_DELIMITER '/'
 # define OF_PATH_DELIMITER_STRING @"/"