diff --git a/src/events/SDL_mouse.c b/src/events/SDL_mouse.c
index aad433dc1..e88489c4a 100644
--- a/src/events/SDL_mouse.c
+++ b/src/events/SDL_mouse.c
@@ -412,8 +412,7 @@ SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relativ
     if (window && ((window->flags & SDL_WINDOW_MOUSE_CAPTURE) == 0)) {
         int x_max = 0, y_max = 0;
 
-        /* !!! FIXME: shouldn't this be (window) instead of (mouse->focus)? */
-        SDL_GetWindowSize(mouse->focus, &x_max, &y_max);
+        SDL_GetWindowSize(window, &x_max, &y_max);
         --x_max;
         --y_max;