diff --git a/Source/Core/DolphinNoGUI/PlatformWin32.cpp b/Source/Core/DolphinNoGUI/PlatformWin32.cpp
index a6a0392fa2..01575ecca5 100644
--- a/Source/Core/DolphinNoGUI/PlatformWin32.cpp
+++ b/Source/Core/DolphinNoGUI/PlatformWin32.cpp
@@ -33,7 +33,7 @@ private:
 
   static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
 
-  bool RegisterRenderWindowClass();
+  static bool RegisterRenderWindowClass();
   bool CreateRenderWindow();
   void UpdateWindowPosition();
   void ProcessEvents();