diff --git a/ui.cpp b/ui.cpp
index fd370a7..bd0fcae 100644
--- a/ui.cpp
+++ b/ui.cpp
@@ -123,6 +123,9 @@
 
     if (register_key) {
         switch (CheckKey(key_code)) {
+          case RecoveryUI::IGNORE:
+            break;
+
           case RecoveryUI::TOGGLE:
             ShowText(!IsTextVisible());
             break;
diff --git a/ui.h b/ui.h
index 750b993..0d3b7bb 100644
--- a/ui.h
+++ b/ui.h
@@ -73,7 +73,7 @@
     // Return value indicates whether an immediate operation should be
     // triggered (toggling the display, rebooting the device), or if
     // the key should be enqueued for use by the main thread.
-    enum KeyAction { ENQUEUE, TOGGLE, REBOOT };
+    enum KeyAction { ENQUEUE, TOGGLE, REBOOT, IGNORE };
     virtual KeyAction CheckKey(int key);
 
     // --- menu display ---