diff --git a/regen.sh b/regen.sh
index 75c51ff686..f5150fe756 100755
--- a/regen.sh
+++ b/regen.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 echo "Updating configuration..."
 echo "Running aclocal"
 aclocal -I src/cf
@@ -11,6 +12,9 @@ autoheader
 #echo "Running automake"
 #automake
 
+echo "Deleting autom4te.cache directory"
+rm -r autom4te.cache
+
 # Rebuild the man pages, to not require those building from source to have
 # pod2man available.
 if test -d doc/man-pages ; then