diff --git a/mount.c b/mount.c
index 47c1e65d6..1d3a77329 100644
--- a/mount.c
+++ b/mount.c
@@ -183,6 +183,7 @@ static char *fstypes[] = {
 	"unsupported",
 	"proc",
 	"sysfs",
+	"devtmpfs",
 };
 
 static u32 encode_fstype(char *fst)