diff --git a/chiliproject_doxygen.sh b/chiliproject_doxygen.sh
index c2e0b6e..3d896dc 100755
--- a/chiliproject_doxygen.sh
+++ b/chiliproject_doxygen.sh
@@ -78,13 +78,13 @@ for i in `seq 0 $((n-1))`; do
 	case ${type[$i]} in
 	Mercurial|Repository::Mercurial)
 		LAST_TAG=`hg tags --color never --noninteractive --quiet -R ${root_url[i]} 2>/dev/null | head -n2 | grep -v '^tip$' \
-		          | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+'`
+		          | grep -E '^v?[0-9]+\.[0-9]+\.[0-9]+'`
 	;;
 	Git|Repository::Git)
 		cd ${root_url[$i]}
 		[ $? != 0 ] && echo "cd ${root_url[$i]} failed" && continue
 		LAST_TAG=`git tag | tail -n1 \
-		          | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+'`
+		          | grep -E '^v?[0-9]+\.[0-9]+\.[0-9]+'`
 		cd $TMP_PATH
 	;;
 	esac