diff --git a/gns3/create-appliance-file.sh b/gns3/create-appliance-file.sh
old mode 100644
new mode 100755
index 280cf6a..9e6552b
--- a/gns3/create-appliance-file.sh
+++ b/gns3/create-appliance-file.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
 VERSION="$1"
-MD5SUM="`cat opennms-horizon.qcow2.gz.md5sum | cut -d\\  -f1`"
-FILESIZE="`stat -c %s opennms-horizon.qcow2.gz`"
+MD5SUM="`cat opennms-horizon.qcow2.gz.md5sum | awk '{print $1}'`"
+FILESIZE="`wc -c opennms-horizon.qcow2.gz | awk '{print $1}'`"
 
 echo "Creating new opennms-horizon.gns3a appliance file:"
 echo "- OpenNMS version.: $VERSION"