2 files changed, 2 insertions, 2 deletions
diff --git a/src/gui/windows/selldialog.cpp b/src/gui/windows/selldialog.cpp
index 727c94108..bded5bc24 100644
--- a/src/gui/windows/selldialog.cpp
+++ b/src/gui/windows/selldialog.cpp
@@ -60,7 +60,7 @@ SellDialog::SellDialog(const int npcId) :
     init();
 }
 
-SellDialog::SellDialog(std::string nick):
+SellDialog::SellDialog(const std::string &nick):
     // TRANSLATORS: sell dialog name
     Window(_("Sell"), false, nullptr, "sell.xml"),
     gcn::ActionListener(),
diff --git a/src/gui/windows/selldialog.h b/src/gui/windows/selldialog.h
index f811cc311..eae33531f 100644
--- a/src/gui/windows/selldialog.h
+++ b/src/gui/windows/selldialog.h
@@ -56,7 +56,7 @@ class SellDialog final : public Window,
         /**
          * Constructor.
          */
-        explicit SellDialog(std::string nick);
+        explicit SellDialog(const std::string &nick);
 
         A_DELETE_COPY(SellDialog)