diff --git a/programs/client/Client.cpp b/programs/client/Client.cpp
index 45314a5d460..a5e4bd45c7f 100644
--- a/programs/client/Client.cpp
+++ b/programs/client/Client.cpp
@@ -89,7 +89,6 @@ namespace ErrorCodes
     extern const int SYNTAX_ERROR;
     extern const int TOO_DEEP_RECURSION;
     extern const int NETWORK_ERROR;
-    extern const int UNRECOGNIZED_ARGUMENTS;
     extern const int AUTHENTICATION_FAILED;
 }