diff --git a/CalcPocketing.cpp b/CalcPocketing.cpp
index cc4655a..5cee0cf 100644
--- a/CalcPocketing.cpp
+++ b/CalcPocketing.cpp
@@ -3792,8 +3792,11 @@ GetZigZagOptimizedCurves( const ISurfFlatRegion* pSfrChunk, const PocketParams&
                   pCrvRes->Clear() ;
             }
          }
-         if ( bOkTrap)
+         if ( bOkTrap) {
            AdjustTrapeziodLeadIn( pCrvRes, PockParam, pSfrChunk) ;
+          // imposto il flag di curva singola
+            pCrvRes->SetTempProp( TEMP_PROP_OPT_TRAPEZOID, 0) ;
+         }
       }
    }
 
@@ -3913,8 +3916,11 @@ GetSpiralOptimizedCurves( const ISurfFlatRegion* pSfrChunk, const PocketParams&
                   pCrvRes->Clear() ;
             }
          }
-         if ( bOkTrap)
+         if ( bOkTrap) {
             AdjustTrapeziodLeadIn( pCrvRes, PockParam, pSfrChunk) ;
+           // imposto il flag di curva singola
+            pCrvRes->SetTempProp( TEMP_PROP_OPT_TRAPEZOID, 0) ;
+         }
       }
    }