diff --git a/install.sh b/install.sh
index b0e68d9..8e1f725 100755
--- a/install.sh
+++ b/install.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 INSTALL_BASEFILE=`readlink -f $0`
+if [ -z $INSTALL_BASEFILE ]; then
+	INSTALL_BASEFILE="$PWD/$0"
+fi
 INSTALL_BASEDIR=`dirname $INSTALL_BASEFILE`
 
 CMD="ln -sfn"