diff --git a/install.sh b/install.sh
index 6d4fb1e..70d20de 100755
--- a/install.sh
+++ b/install.sh
@@ -14,6 +14,11 @@ echo ""
 cp lch /usr/bin/lch
 chmod 755 /usr/bin/lch
 echo " Copied lch in /usr/bin"
+
+if [ -z "$MANPATH" ];then
+  MANPATH=$(manpath)
+fi
+
 MANDIR=${MANPATH%%:*}/man1 
 cp lch.1 $MANDIR/lch.1
 gzip $MANDIR/lch.1