diff --git a/Tree.cpp b/Tree.cpp
index 1771f7c..dbc8ec0 100644
--- a/Tree.cpp
+++ b/Tree.cpp
@@ -1717,13 +1717,13 @@ Tree::FindCell( const Point3d& ptToAssign, const CurveLine& cl, INTVECTOR vCells
             ptIntersPlus = ptIntersPlus + vtDirDX * EPS_SMALL ;
          }
          else if ( (nEdge == 0  ||  nEdge == 2)  &&  abs(vtDir.y) > EPS_SMALL)
-            ptIntersPlus.y +=  Sign( vtDir.y) * EPS_SMALL ;
+            ptIntersPlus.y +=  (vtDir.y > 0 ? 1 : -1) * EPS_SMALL ;
          else if ( ( nEdge == 1 || nEdge == 3 ) && abs(vtDir.y) > 1 - EPS_SMALL ) {
             Vector3d vtDirDX = vtDir ; vtDirDX.Rotate( Z_AX, -90) ;
             ptIntersPlus = ptIntersPlus + vtDirDX * EPS_SMALL ;
          }
          else if ( (nEdge == 1  ||  nEdge == 3)  &&  abs(vtDir.x) > EPS_SMALL)
-            ptIntersPlus.x += Sign( vtDir.x) * EPS_SMALL ;
+            ptIntersPlus.x += (vtDir.x > 0 ? 1 : -1) * EPS_SMALL ;
       }
       // o in un vertice
       else if ( nEdge == 4  ||  nEdge == 5  ||  nEdge == 6  ||  nEdge == 7) {