diff --git a/LEGO1/mxdisplaysurface.cpp b/LEGO1/mxdisplaysurface.cpp
index f2a4aa2f..5a4b04f1 100644
--- a/LEGO1/mxdisplaysurface.cpp
+++ b/LEGO1/mxdisplaysurface.cpp
@@ -232,7 +232,7 @@ undefined4 MxDisplaySurface::vtable44(undefined4, undefined4*, undefined4, undef
 }
 
 // OFFSET: LEGO1 0x100ba640 STUB
-void MxDisplaySurface::FUN_100ba640(MxDisplaySurface *p_displaySurface)
+void MxDisplaySurface::FUN_100ba640()
 {
   // TODO
 }
diff --git a/LEGO1/mxdisplaysurface.h b/LEGO1/mxdisplaysurface.h
index 1d5f4ce1..be84064c 100644
--- a/LEGO1/mxdisplaysurface.h
+++ b/LEGO1/mxdisplaysurface.h
@@ -19,7 +19,7 @@ class MxDisplaySurface : public MxCore
 
   void Reset();
 
-  static void FUN_100ba640(MxDisplaySurface *p_displaySurface);
+  void FUN_100ba640();
 
   virtual MxResult Init(MxVideoParam &p_videoParam, LPDIRECTDRAWSURFACE p_ddSurface1, LPDIRECTDRAWSURFACE p_ddSurface2, LPDIRECTDRAWCLIPPER p_ddClipper);
   virtual MxResult Create(MxVideoParam &p_videoParam);
diff --git a/LEGO1/mxtransitionmanager.cpp b/LEGO1/mxtransitionmanager.cpp
index 368fd8e7..75a3785a 100644
--- a/LEGO1/mxtransitionmanager.cpp
+++ b/LEGO1/mxtransitionmanager.cpp
@@ -108,7 +108,7 @@ void MxTransitionManager::EndTransition(MxBool p_unk)
 void MxTransitionManager::FUN_1004bcf0()
 {
   LegoVideoManager *videoManager = VideoManager();
-  MxDisplaySurface::FUN_100ba640(videoManager->GetDisplaySurface());
+  videoManager->GetDisplaySurface()->FUN_100ba640();
   EndTransition(TRUE);
 }