diff --git a/os-prober-umount-fix.patch b/os-prober-umount-fix.patch
index 2f8696f..ca624d3 100644
--- a/os-prober-umount-fix.patch
+++ b/os-prober-umount-fix.patch
@@ -9,7 +9,7 @@ Index: os-prober-1.58/common.sh
 +
 +umount_exec=$(which umount)
 +umount() {
-+	if ! $umount_exec $@; then
++	if ! $umount_exec $@ 2> /dev/null; then
 +		error "umount error, retrying after 1 sec"
 +		sleep 1
 +		$umount_exec $@