diff --git a/Source/Core/Core/HW/GCPadEmu.h b/Source/Core/Core/HW/GCPadEmu.h
index 067c3f2720..a239c299b5 100644
--- a/Source/Core/Core/HW/GCPadEmu.h
+++ b/Source/Core/Core/HW/GCPadEmu.h
@@ -25,7 +25,7 @@ enum class PadGroup
 class GCPad : public ControllerEmu
 {
 public:
-  GCPad(const unsigned int index);
+  explicit GCPad(unsigned int index);
   GCPadStatus GetInput() const;
   void SetOutput(const ControlState strength);