diff --git a/scripts/fuzz/rfz_command.c b/scripts/fuzz/rfz_command.c
index 9f87b034..c663c9b8 100644
--- a/scripts/fuzz/rfz_command.c
+++ b/scripts/fuzz/rfz_command.c
@@ -49,6 +49,7 @@ ExecuteRTPPCommand(struct rtpp_conf *gcp, const char *data, size_t size, int deb
     }
     assert(tp == cmd->reply);
     assert(trp == cmd->reply->rcnt);
+    assert(CALL_SMETHOD(cmd->reply->rcnt, peek) == 1);
     free_command(cmd);
     return (rval);
 }