diff --git a/cmdmon.c b/cmdmon.c
index 4aea031..04dd7d0 100644
--- a/cmdmon.c
+++ b/cmdmon.c
@@ -2288,7 +2288,7 @@ read_from_cmd_socket(void *anything)
           break;
 
         default:
-          /* Ignore message */
+          assert(0);
           break;
       }
     } else {