diff --git a/NestProcess.lua b/NestProcess.lua
index 2e12443..f70fdd9 100644
--- a/NestProcess.lua
+++ b/NestProcess.lua
@@ -1890,7 +1890,7 @@ if bNestingOk then
                local nTotFlip = EgtIf( nPartFlip ~= nFlag, 180, 0)
                EgtSetInfo( nPartDuploId, "FLIP", nTotFlip)
                
-               local bPartFlip = ( ( EgtGetInfo( nId, "INVERTED", 'i') or 0) == 180)
+               local bPartFlip = ( nTotFlip == 180)
                local nPartRot = EgtGetInfo( nId, "ROTATED", 'i') or 0
                local nTotRot = nPartRot - EgtIf( bPartFlip, -dAngRot, dAngRot)
                if nTotRot < 0 then