diff --git a/src/Game.cpp b/src/Game.cpp
index a7a4c82..c622c41 100644
--- a/src/Game.cpp
+++ b/src/Game.cpp
@@ -176,7 +176,7 @@ namespace d2
   int Game::mouse_y() const
   {
     int y;
-    SDL_GetMouseState(&y, nullptr);
+    SDL_GetMouseState(nullptr, &y);
     return y;
   }