diff --git a/clientgui/MainDocument.cpp b/clientgui/MainDocument.cpp
index 0da552358b..44b44bd1c3 100644
--- a/clientgui/MainDocument.cpp
+++ b/clientgui/MainDocument.cpp
@@ -435,7 +435,7 @@ int CMainDocument::GetConnectingComputerName(wxString& strMachine) {
 }
 
 
-bool CMainDocument::IsComputerNameLocal(wxString& strMachine) {
+bool CMainDocument::IsComputerNameLocal(wxString strMachine) {
     return m_pNetworkConnection->IsComputerNameLocal(strMachine);
 }
 
diff --git a/clientgui/MainDocument.h b/clientgui/MainDocument.h
index 652b8ef28f..e15f46104f 100644
--- a/clientgui/MainDocument.h
+++ b/clientgui/MainDocument.h
@@ -118,7 +118,7 @@ public:
 
     int                         GetConnectedComputerName(wxString& strMachine);
     int                         GetConnectingComputerName(wxString& strMachine);
-    bool                        IsComputerNameLocal(wxString& strMachine);
+    bool                        IsComputerNameLocal(wxString strMachine);
     bool                        IsConnected();
     bool                        IsReconnecting();