diff --git a/src/interface/viewport.c b/src/interface/viewport.c
index 5ec11bf5a4..11175a52d6 100644
--- a/src/interface/viewport.c
+++ b/src/interface/viewport.c
@@ -271,11 +271,7 @@ void sub_689174(sint16* x, sint16* y, sint16 *z)
 
 void sub_6E7FF3(rct_window *w, rct_viewport *viewport, int x, int y)
 {
-#ifdef _WIN32
 	RCT2_CALLPROC_X(0x006E7FF3, 0, 0, 0, x, (int)viewport, (int)w, y);
-#else
-	STUB();
-#endif // _WIN32
 
 //	int zoom = 1 << viewport->zoom;
 //	if (w >= RCT2_GLOBAL(RCT2_ADDRESS_NEW_WINDOW_PTR, rct_window*)){