1 files changed, 3 insertions, 0 deletions

diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index 74cf40d551..d6bc965137 100755
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -136,6 +136,9 @@ unmount_device() {
 }
 
 unmount() {
+        if [ "$1" = "" ] ; then
+                return 0
+        fi
         grep -q $1 /proc/mounts
         if [ $? -eq 0 ]; then
                 debug "Unmounting $1"