diff --git a/core/src/apps/base.py b/core/src/apps/base.py
index d15a48660..e3c6e53ce 100644
--- a/core/src/apps/base.py
+++ b/core/src/apps/base.py
@@ -120,6 +120,7 @@ async def handle_Ping(ctx: wire.Context, msg: Ping) -> Success:
 ALLOW_WHILE_LOCKED = (
     MessageType.Initialize,
     MessageType.GetFeatures,
+    MessageType.LockDevice,
     MessageType.WipeDevice,
 )