diff --git a/meshtastic/module_config.proto b/meshtastic/module_config.proto
index 33d6290..91eb4c6 100644
--- a/meshtastic/module_config.proto
+++ b/meshtastic/module_config.proto
@@ -590,6 +590,11 @@ message ModuleConfig {
 }
 
 enum RemoteHardwarePinType {
+  /*
+   * Unset/unused
+   */
+  UNKNOWN = 0;
+
   /*
    * GPIO pin can be read (if it is high / low)
    */