diff --git a/LEGO1/omni/include/mxdisplaysurface.h b/LEGO1/omni/include/mxdisplaysurface.h
index eb5d9ea3..290950f2 100644
--- a/LEGO1/omni/include/mxdisplaysurface.h
+++ b/LEGO1/omni/include/mxdisplaysurface.h
@@ -109,7 +109,7 @@ class MxDisplaySurface : public MxCore {
 		MxU8 p_bpp
 	);
 
-	LPDIRECTDRAWSURFACE FUN_100bc8b0(MxS32 width, MxS32 height);
+	LPDIRECTDRAWSURFACE FUN_100bc8b0(MxS32 p_width, MxS32 p_height);
 
 private:
 	MxU8 CountTotalBitsSetTo1(MxU32 p_param);