diff --git a/src/rendering/polyrenderer/drawers/screen_triangle.cpp b/src/rendering/polyrenderer/drawers/screen_triangle.cpp
index 2e99e3967..0f3aeb284 100644
--- a/src/rendering/polyrenderer/drawers/screen_triangle.cpp
+++ b/src/rendering/polyrenderer/drawers/screen_triangle.cpp
@@ -1386,7 +1386,7 @@ static void DrawSpan(int y, int x0, int x1, const TriDrawTriangleArgs* args, Pol
 			if (xstart < x0)
 			{
 				if (thread->WriteColor)
-					thread->WriteColorFunc(y, x0, x1, thread);
+					thread->WriteColorFunc(y, xstart, x0, thread);
 				if (thread->WriteDepth)
 					WriteDepth(y, xstart, x0, thread);
 				if (thread->WriteStencil)