diff --git a/src/blackmisc/input/joystickbutton.cpp b/src/blackmisc/input/joystickbutton.cpp
index b6e170d31..98a3245f9 100644
--- a/src/blackmisc/input/joystickbutton.cpp
+++ b/src/blackmisc/input/joystickbutton.cpp
@@ -15,7 +15,7 @@ namespace BlackMisc
 {
     namespace Input
     {
-        CJoystickButton::CJoystickButton(const QString deviceName, int index) :
+        CJoystickButton::CJoystickButton(const QString &deviceName, int index) :
             m_deviceName(deviceName), m_buttonIndex(index)
         {}
 
diff --git a/src/blackmisc/input/joystickbutton.h b/src/blackmisc/input/joystickbutton.h
index aaddfd4df..8b7de74a7 100644
--- a/src/blackmisc/input/joystickbutton.h
+++ b/src/blackmisc/input/joystickbutton.h
@@ -43,7 +43,7 @@ namespace BlackMisc
             CJoystickButton() = default;
 
             //! Constructor
-            CJoystickButton(const QString deviceName, int index);
+            CJoystickButton(const QString &deviceName, int index);
 
             //! Get device name
             QString getDeviceName() const { return m_deviceName; }