diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index d1b97c5..f738c60 100644
--- a/util/cbfstool/cbfs.h
+++ b/util/cbfstool/cbfs.h
@@ -88,7 +88,7 @@
 	char filename[];
 } __PACKED;
 
-#if defined __GNUC__ && (__GNUC__ * 100 + __GNUC_MINOR__) >= 405
+#if defined __GNUC__ && (__GNUC__ * 100 + __GNUC_MINOR__) >= 406
 _Static_assert(sizeof(struct cbfs_file) == 24, "cbfs_file size mismatch");
 #endif