diff --git a/luprex/core/cpp/drivenengine.cpp b/luprex/core/cpp/drivenengine.cpp
index da295e21..712caaa2 100644
--- a/luprex/core/cpp/drivenengine.cpp
+++ b/luprex/core/cpp/drivenengine.cpp
@@ -11,7 +11,7 @@ Channel::Channel(DrivenEngine *de, int chid, int port, const std::string &target
     target_ = target;
     readline_enabled_ = (chid == 0);
     readline_lastc_ = 0;
-    desired_prompt_ = "] ";
+    desired_prompt_ = "";
     assert(driven_->channels_[chid_] == nullptr);
     driven_->channels_[chid_] = this;
 }