diff --git a/ares/m4/reentrant.m4 b/ares/m4/reentrant.m4
index 29cc809ea4a7afe071c0650e693023512ed2528e..0348fda1352e4ff473d5cd3f768faf2ef1a733f9 100644
--- a/ares/m4/reentrant.m4
+++ b/ares/m4/reentrant.m4
@@ -1,5 +1,8 @@
 
 
+# serial 1.10
+
+
 dnl CARES_CHECK_NEED_REENTRANT_GMTIME_R
 dnl -------------------------------------------------
 dnl Checks if the preprocessor _REENTRANT definition
diff --git a/m4/reentrant.m4 b/m4/reentrant.m4
index 23a1cb77ee91dffd784320a939708cf5ad029b56..5ec0de076b07e225cd6c8b5fa7b0de0afd9e0aca 100644
--- a/m4/reentrant.m4
+++ b/m4/reentrant.m4
@@ -22,6 +22,9 @@
 #***************************************************************************
 
 
+# serial 1.12
+
+
 dnl CURL_CHECK_NEED_REENTRANT_GMTIME_R
 dnl -------------------------------------------------
 dnl Checks if the preprocessor _REENTRANT definition