diff --git a/src/protocol.c b/src/protocol.c
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -94,6 +94,9 @@ bool protocol_process_message(protocol_m
                     result = protocol_config(message);
                 }
                 break;
+            default:
+                result = false;
+                break;
         }
     }