diff --git a/tools/builder_common.sh b/tools/builder_common.sh
index ced9483e8e..79ab4a1366 100644
--- a/tools/builder_common.sh
+++ b/tools/builder_common.sh
@@ -673,7 +673,7 @@ create_ova_image() {
 		echo ">>> ERROR: Error mounting temporary vmdk image. STOPPING!" | tee -a ${LOGFILE}
 		print_error_pfS
 	fi
-	trap "sync; sleep 3; umount ${_mntdir}; mdconfig -d -u ${_md}; return" 1 2 15 EXIT
+	trap "sync; sleep 3; umount ${_mntdir} || umount -f ${_mntdir}; mdconfig -d -u ${_md}; return" 1 2 15 EXIT
 
 	echo "Done!" | tee -a ${LOGFILE}
 
@@ -681,7 +681,7 @@ create_ova_image() {
 
 	sync
 	sleep 3
-	umount ${_mntdir} 2>&1 >>${LOGFILE}
+	umount ${_mntdir} || umount -f ${_mntdir} >>${LOGFILE} 2>&1
 	mdconfig -d -u ${_md}
 	trap "-" 1 2 15 EXIT