diff --git a/engines/sword25/gfx/image/vectorimagerenderer.cpp b/engines/sword25/gfx/image/vectorimagerenderer.cpp
index a8820d9121f..4a791eb80b3 100644
--- a/engines/sword25/gfx/image/vectorimagerenderer.cpp
+++ b/engines/sword25/gfx/image/vectorimagerenderer.cpp
@@ -67,7 +67,8 @@ void art_rgb_run_alpha1(art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, in
 		v = *buf;
 		*buf++ = v + (((r - v) * alpha + 0x80) >> 8);
 		v = *buf;
-		*buf++ = v + (((alpha - v) * alpha + 0x80) >> 8);
+		// FIXME: Is this correct?
+		*buf++ = MIN(v + alpha, 0xff);
 	}
 }