diff --git a/tile.cpp b/tile.cpp
index b1290090..f8d20827 100644
--- a/tile.cpp
+++ b/tile.cpp
@@ -1388,8 +1388,8 @@ extern struct SLineMatrixData	LineMatrixData[240];
 #define DRAW_PIXEL_H2x1(N, M) \
 	if (Z1 > GFX.DB[Offset + 2 * N] && (M)) \
 	{ \
-		GFX.S[Offset + 2 * N] = MATH(GFX.ScreenColors[Pix], GFX.SubScreen[Offset + 2 * N], GFX.SubZBuffer[Offset + 2 * N]); \
-		GFX.S[Offset + 2 * N + 1] = MATH((GFX.ClipColors ? 0 : GFX.SubScreen[Offset + 2 * N + 2]), GFX.RealScreenColors[Pix], GFX.SubZBuffer[Offset + 2 * N]); \
+		GFX.S[Offset + 2 * N] = MATH((GFX.ClipColors ? 0 : GFX.SubScreen[Offset + 2 * N]), GFX.RealScreenColors[Pix], GFX.SubZBuffer[Offset + 2 * N]); \
+		GFX.S[Offset + 2 * N + 1] = MATH(GFX.ScreenColors[Pix], GFX.SubScreen[Offset + 2 * N], GFX.SubZBuffer[Offset + 2 * N]); \
 		GFX.DB[Offset + 2 * N] = GFX.DB[Offset + 2 * N + 1] = Z2; \
 	}