diff --git a/common/rfb/tightDecode.h b/common/rfb/tightDecode.h
index 9cf234d..9679dd7 100644
--- a/common/rfb/tightDecode.h
+++ b/common/rfb/tightDecode.h
@@ -267,10 +267,8 @@
       break;
     }
 
-    for (int dx = 0; dx < r.width(); dx++) {
-      *pixelPtr++ = 
-	myFormat.pixelFromRGB(scanline[dx*3], scanline[dx*3+1], scanline[dx*3+2]);
-    }
+    myFormat.bufferFromRGB((rdr::U8*)pixelPtr, (const rdr::U8*)scanline, r.width());
+    pixelPtr += r.width();
   }
 
   IMAGE_RECT(r, buf);