diff --git a/src/Mod/Sketcher/App/SketchObject.cpp b/src/Mod/Sketcher/App/SketchObject.cpp
index 5fd5986e4d..52c03cec61 100644
--- a/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/src/Mod/Sketcher/App/SketchObject.cpp
@@ -2299,23 +2299,21 @@ int SketchObject::addSymmetric(const std::vector<int> &geoIdList, int refGeoId,
             else if(geosym->getTypeId() == Part::GeomArcOfParabola::getClassTypeId()){
                 Part::GeomArcOfParabola *geosymaoe = static_cast<Part::GeomArcOfParabola *>(geosym);
                 Base::Vector3d cp = geosymaoe->getCenter();
-                Base::Vector3d sp = geosymaoe->getStartPoint(true);
-                Base::Vector3d ep = geosymaoe->getEndPoint(true);
 
                 //double df= geosymaoe->getFocal();
                 Base::Vector3d f1 = geosymaoe->getFocus();
 
                 Base::Vector3d sf1 = f1+2.0*(f1.Perpendicular(refGeoLine->getStartPoint(),vectline)-f1);
                 Base::Vector3d scp = cp+2.0*(cp.Perpendicular(refGeoLine->getStartPoint(),vectline)-cp);
-                Base::Vector3d ssp = sp+2.0*(sp.Perpendicular(refGeoLine->getStartPoint(),vectline)-sp);
-                Base::Vector3d sep = ep+2.0*(ep.Perpendicular(refGeoLine->getStartPoint(),vectline)-ep);
 
                 geosymaoe->setXAxisDir(sf1-scp);
                 geosymaoe->setCenter(scp);
 
                 double theta1,theta2;
-                geosymaoe->closestParameter(sep,theta1);
-                geosymaoe->closestParameter(ssp,theta2);
+                geosymaoe->getRange(theta1,theta2,true);
+                theta1 = -theta1;
+                theta2 = -theta2;
+                std::swap(theta1, theta2);
 
                 geosymaoe->setRange(theta1,theta2,true);
                 isStartEndInverted.insert(std::make_pair(*it, true)); 
@@ -2542,37 +2540,27 @@ int SketchObject::addSymmetric(const std::vector<int> &geoIdList, int refGeoId,
             else if(geosym->getTypeId() == Part::GeomArcOfParabola::getClassTypeId()){
                 Part::GeomArcOfParabola *geosymaoe = static_cast<Part::GeomArcOfParabola *>(geosym);
                 Base::Vector3d cp = geosymaoe->getCenter();
-                Base::Vector3d sp = geosymaoe->getStartPoint(true);
-                Base::Vector3d ep = geosymaoe->getEndPoint(true);
 
                 /*double df= geosymaoe->getFocal();*/
                 Base::Vector3d f1 = geosymaoe->getFocus();
 
                 Base::Vector3d sf1 = f1 + 2.0*(refpoint-f1);
                 Base::Vector3d scp = cp + 2.0*(refpoint-cp);
-                Base::Vector3d ssp = sp + 2.0*(refpoint-sp);
-                Base::Vector3d sep = ep + 2.0*(refpoint-ep);
 
                 geosymaoe->setXAxisDir(sf1-scp);
                 geosymaoe->setCenter(scp);
 
-                double theta1,theta2;
-                geosymaoe->closestParameter(ssp,theta1);
-                geosymaoe->closestParameter(sep,theta2);
-
-                geosymaoe->setRange(theta1,theta2,true);
                 isStartEndInverted.insert(std::make_pair(*it, false));
             }
             else if(geosym->getTypeId() == Part::GeomBSplineCurve::getClassTypeId()){
                 Part::GeomBSplineCurve *geosymbsp = static_cast<Part::GeomBSplineCurve *>(geosym);
-                
+
                 std::vector<Base::Vector3d> poles = geosymbsp->getPoles();
                 
                 for(std::vector<Base::Vector3d>::iterator it = poles.begin(); it != poles.end(); ++it){
-                    
                     (*it) = (*it) + 2.0*(refpoint-(*it));
                 }
-                
+
                 geosymbsp->setPoles(poles);
 
                 //isStartEndInverted.insert(std::make_pair(*it, false));