diff --git a/src/middleware/Me.js b/src/middleware/Me.js
index c2e8e24..edf40db 100644
--- a/src/middleware/Me.js
+++ b/src/middleware/Me.js
@@ -37,7 +37,9 @@ class Me extends Pages {
             }
         }
 
-        user.mastodon = value.mastodon;
+        if (value.mastodon !== undefined) {
+            user.mastodon = value.mastodon;
+        }
 
         if (value.password) {
             user.salt = value.password;