diff --git a/resources/grub/config/grub.cfg b/resources/grub/config/grub.cfg
index 24516b9..69ac35f 100644
--- a/resources/grub/config/grub.cfg
+++ b/resources/grub/config/grub.cfg
@@ -107,7 +107,7 @@ menuentry 'Load Operating System (incl. fully encrypted disks)  [o]' --hotkey='o
 	fi
 
 	for device in (*) ; do
-		if regexp ^lvm/ $device ; then
+		if regexp "^\(lvm/" "${device}" ; then
 			try_user_config "${device}"
 		fi
 	done
@@ -141,7 +141,7 @@ menuentry 'Load Operating System (incl. fully encrypted disks)  [o]' --hotkey='o
 	done
 
 	for device in (*) ; do
-		if regexp ^lvm/ "${device}" ; then
+		if regexp "^\(lvm/" "${device}" ; then
 			if cryptomount "${device}" ; then break ; fi
 		fi
 	done
@@ -152,7 +152,7 @@ menuentry 'Load Operating System (incl. fully encrypted disks)  [o]' --hotkey='o
 
 	# after cryptomount, lvm volumes might be available
 	for device in (*) ; do
-		if regexp ^lvm/ $device ; then
+		if regexp "^\(lvm/" "${device}" ; then
 			try_user_config "${device}"
 		fi
 	done