diff --git a/src/qt/signverifymessagedialog.cpp b/src/qt/signverifymessagedialog.cpp
index b3fc69ef..371b5ba5 100644
--- a/src/qt/signverifymessagedialog.cpp
+++ b/src/qt/signverifymessagedialog.cpp
@@ -55,13 +55,13 @@ void SignVerifyMessageDialog::setModel(WalletModel *model)
     this->model = model;
 }
 
-void SignVerifyMessageDialog::setAddress_SM(QString address)
+void SignVerifyMessageDialog::setAddress_SM(const QString &address)
 {
     ui->addressIn_SM->setText(address);
     ui->messageIn_SM->setFocus();
 }
 
-void SignVerifyMessageDialog::setAddress_VM(QString address)
+void SignVerifyMessageDialog::setAddress_VM(const QString &address)
 {
     ui->addressIn_VM->setText(address);
     ui->messageIn_VM->setFocus();
diff --git a/src/qt/signverifymessagedialog.h b/src/qt/signverifymessagedialog.h
index 5569c8bf..2c2677cc 100644
--- a/src/qt/signverifymessagedialog.h
+++ b/src/qt/signverifymessagedialog.h
@@ -20,8 +20,8 @@ public:
     ~SignVerifyMessageDialog();
 
     void setModel(WalletModel *model);
-    void setAddress_SM(QString address);
-    void setAddress_VM(QString address);
+    void setAddress_SM(const QString &address);
+    void setAddress_VM(const QString &address);
 
     void showTab_SM(bool fShow);
     void showTab_VM(bool fShow);