diff --git a/include/mount.h b/include/mount.h
index 76f4fed00..3e4508715 100644
--- a/include/mount.h
+++ b/include/mount.h
@@ -22,4 +22,6 @@ extern struct mount_info *lookup_mnt_sdev(unsigned int s_dev);
 
 extern struct ns_desc mnt_ns_desc;
 
+extern bool phys_stat_dev_match(dev_t st_dev, dev_t phys_dev);
+
 #endif /* __CR_MOUNT_H__ */
diff --git a/mount.c b/mount.c
index 5a1a85d59..22b838303 100644
--- a/mount.c
+++ b/mount.c
@@ -18,6 +18,7 @@
 #include "util-pie.h"
 #include "log.h"
 #include "mount.h"
+#include "mount-btrfs.h"
 #include "pstree.h"
 #include "proc_parse.h"
 #include "image.h"
@@ -97,6 +98,19 @@ struct mount_info *lookup_mnt_sdev(unsigned int s_dev)
 	return NULL;
 }
 
+bool phys_stat_dev_match(dev_t st_dev, dev_t phys_dev)
+{
+	if (st_dev == phys_dev)
+		return true;
+
+	/*
+	 * BTRFS returns subvolume dev-id instead of
+	 * superblock dev-id so we might need additional
+	 * tests here.
+	 */
+	return is_btrfs_subvol(phys_dev, st_dev);
+}
+
 /*
  * Comparer two mounts. Return true if only mount points are differ.
  * Don't care about root and mountpoints, if bind is true.