diff --git a/src/360SCVP/360SCVPImpl.cpp b/src/360SCVP/360SCVPImpl.cpp
index df0d9306..79aaf919 100644
--- a/src/360SCVP/360SCVPImpl.cpp
+++ b/src/360SCVP/360SCVPImpl.cpp
@@ -1442,8 +1442,8 @@ int TstitchStream::GenerateRwpkInfo(RegionWisePacking *dstRwpk)
 
             rwpk->packedRegWidth = lowRes_tile_width;
             rwpk->packedRegHeight = lowRes_tile_height;
-            rwpk->projRegWidth  = lowRes_tile_width * m_mergeStreamParam.highRes.width / m_mergeStreamParam.lowRes.width;
-            rwpk->projRegHeight = lowRes_tile_height * m_mergeStreamParam.highRes.height / m_mergeStreamParam.lowRes.height;
+            rwpk->projRegWidth  = lowRes_tile_width;
+            rwpk->projRegHeight = lowRes_tile_height;
             rwpk->projRegTop  = (lowIdx / m_tileWidthCountOri[1] * rwpk->projRegHeight);
             rwpk->projRegLeft = (lowIdx % m_tileWidthCountOri[1] * rwpk->projRegWidth);
             rwpk->packedRegTop = (lowIdx % m_lrTilesInCol) * lowRes_tile_height;