diff --git a/src/xinterpreter.cpp b/src/xinterpreter.cpp
index 1120e23..9dc2ba8 100644
--- a/src/xinterpreter.cpp
+++ b/src/xinterpreter.cpp
@@ -128,7 +128,6 @@ nl::json interpreter::is_complete_request_impl(const std::string& code)
             return xeus::create_is_complete_reply("incomplete", "");
 
         case PARSE_ERROR:
-            Rprintf("invalid");
             return xeus::create_is_complete_reply("invalid", "");
     }
 }