1 files changed, 4 insertions, 4 deletions
diff --git a/src/engine/controls/loopingcontrol.h b/src/engine/controls/loopingcontrol.h
index d57396586c..b9f1028299 100644
--- a/src/engine/controls/loopingcontrol.h
+++ b/src/engine/controls/loopingcontrol.h
@@ -24,7 +24,7 @@ class LoopingControl : public EngineControl {
   public:
     static QList<double> getBeatSizes();
 
-    LoopingControl(QString group, UserSettingsPointer pConfig);
+    LoopingControl(const QString& group, UserSettingsPointer pConfig);
     ~LoopingControl() override;
 
     // process() updates the internal state of the LoopingControl to reflect the
@@ -174,7 +174,7 @@ class LoopingControl : public EngineControl {
 class LoopMoveControl : public QObject {
     Q_OBJECT
   public:
-    LoopMoveControl(QString group, double size);
+    LoopMoveControl(const QString& group, double size);
     virtual ~LoopMoveControl();
 
   signals:
@@ -195,7 +195,7 @@ class LoopMoveControl : public QObject {
 class BeatJumpControl : public QObject {
     Q_OBJECT
   public:
-    BeatJumpControl(QString group, double size);
+    BeatJumpControl(const QString& group, double size);
     virtual ~BeatJumpControl();
 
   signals:
@@ -216,7 +216,7 @@ class BeatJumpControl : public QObject {
 class BeatLoopingControl : public QObject {
     Q_OBJECT
   public:
-    BeatLoopingControl(QString group, double size);
+    BeatLoopingControl(const QString& group, double size);
     virtual ~BeatLoopingControl();
 
     void activate();