diff --git a/disk-utils/fsck.c b/disk-utils/fsck.c
index 84d2dcc..73ec9bd 100644
--- a/disk-utils/fsck.c
+++ b/disk-utils/fsck.c
@@ -109,6 +109,7 @@ struct fsck_instance {
 
 	int	lock;		/* flock()ed lockpath file descriptor or -1 */
 	char	*lockpath;	/* /run/fsck/<diskname>.lock or NULL */
+	int	lock_stacked;	/* flock()ed stacked file descriptor or -1 */
 
 	int	exit_status;
 	struct timeval start_time;
@@ -337,6 +338,7 @@ static int is_irrotational_disk(dev_t disk)
 
 static void lock_disk(struct fsck_instance *inst)
 {
+	char path[PATH_MAX];
 	dev_t disk = fs_get_disk(inst->fs, 1);
 	char *diskpath = NULL, *diskname;
 
@@ -365,6 +367,18 @@ static void lock_disk(struct fsck_instance *inst)
 	if (!diskname)
 		diskname = diskpath;
 
+	snprintf(path, sizeof(path), FSCK_RUNTIME_DIRNAME "/stacked.lock");
+
+	inst->lock_stacked = open(path, O_RDONLY|O_CREAT|O_CLOEXEC,
+				    S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH);
+	if (inst->lock_stacked >= 0) {
+		if (flock(inst->lock_stacked,
+			fs_is_stacked(inst->fs) ? LOCK_EX : LOCK_SH) != 0) {
+			close(inst->lock_stacked);	/* failed */
+			inst->lock_stacked = -1;
+		}
+	}
+ 	
 	xasprintf(&inst->lockpath, FSCK_RUNTIME_DIRNAME "/%s.lock", diskname);
 
 	if (verbose)
@@ -410,10 +424,12 @@ static void unlock_disk(struct fsck_instance *inst)
 		printf(_("Unlocking %s.\n"), inst->lockpath);
 
 	close(inst->lock);			/* unlock */
+	close(inst->lock_stacked);		/* unlock */
 
 	free(inst->lockpath);
 
 	inst->lock = -1;
+	inst->lock_stacked = -1;
 	inst->lockpath = NULL;
 }