diff --git a/mount.c b/mount.c
index 3a45de2e1..1427e6a81 100644
--- a/mount.c
+++ b/mount.c
@@ -342,13 +342,13 @@ out:
 }
 
 static struct fstype fstypes[] = {
-	{ "unsupported" },
-	{ "proc" },
-	{ "sysfs" },
-	{ "devtmpfs" },
-	{ "binfmt_misc", binfmt_misc_dump },
-	{ "tmpfs", tmpfs_dump, tmpfs_restore },
-	{ "devpts" },
+	[FSTYPE__UNSUPPORTED]	= { "unsupported" },
+	[FSTYPE__PROC]		= { "proc" },
+	[FSTYPE__SYSFS]		= { "sysfs" },
+	[FSTYPE__DEVTMPFS]	= { "devtmpfs" },
+	[FSTYPE__BINFMT_MISC]	= { "binfmt_misc", binfmt_misc_dump },
+	[FSTYPE__TMPFS]		= { "tmpfs", tmpfs_dump, tmpfs_restore },
+	[FSTYPE__DEVPTS]	= { "devpts" },
 };
 
 struct fstype *find_fstype_by_name(char *fst)
diff --git a/protobuf/mnt.proto b/protobuf/mnt.proto
index 25aed8fd4..0c529ac83 100644
--- a/protobuf/mnt.proto
+++ b/protobuf/mnt.proto
@@ -1,3 +1,13 @@
+enum fstype {
+	UNSUPPORTED		= 0;
+	PROC			= 1;
+	SYSFS			= 2;
+	DEVTMPFS		= 3;
+	BINFMT_MISC		= 4;
+	TMPFS			= 5;
+	DEVPTS			= 6;
+};
+
 message mnt_entry {
 	required uint32		fstype			= 1;
 	required uint32		mnt_id			= 2;