diff --git a/m4/curl-functions.m4 b/m4/curl-functions.m4
index 6cc49f13c..419571a26 100644
--- a/m4/curl-functions.m4
+++ b/m4/curl-functions.m4
@@ -21,7 +21,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 66
+# serial 68
 
 
 dnl CURL_INCLUDES_ARPA_INET