diff --git a/User.cpp b/User.cpp
index cd6269dc..ec39937f 100644
--- a/User.cpp
+++ b/User.cpp
@@ -464,7 +464,7 @@ void CUser::RemoveNetwork(CIRCNetwork *pNetwork) {
 	}
 }
 
-bool CUser::DeleteNetwork(CString sNetwork) {
+bool CUser::DeleteNetwork(const CString& sNetwork) {
 	CIRCNetwork *pNetwork = FindNetwork(sNetwork);
 
 	if (pNetwork) {
diff --git a/User.h b/User.h
index f20dfb91..02773e3a 100644
--- a/User.h
+++ b/User.h
@@ -67,7 +67,7 @@ public:
 
 	// Networks
 	CIRCNetwork* AddNetwork(const CString &sNetwork);
-	bool DeleteNetwork(CString sNetwork);
+	bool DeleteNetwork(const CString& sNetwork);
 	bool AddNetwork(CIRCNetwork *pNetwork);
 	void RemoveNetwork(CIRCNetwork *pNetwork);
 	CIRCNetwork* FindNetwork(const CString& sNetwork);