diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 092636560..8fc478886 100644
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -1,4 +1,4 @@
-#serial 12
+#serial 13
 
 dnl Misc type-related macros for fileutils, sh-utils, textutils.