diff --git a/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp b/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
index cafcee769f..3e4ea3e6c6 100644
--- a/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
+++ b/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
@@ -76,11 +76,12 @@ bool isSketcherBSplineActive(Gui::Document *doc, bool actsOnSelection)
 
 void ActivateBSplineHandler(Gui::Document *doc,DrawSketchHandler *handler)
 {
+    std::unique_ptr<DrawSketchHandler> ptr(handler);
     if (doc) {
         if (doc->getInEdit() && doc->getInEdit()->isDerivedFrom(SketcherGui::ViewProviderSketch::getClassTypeId())) {
             SketcherGui::ViewProviderSketch* vp = static_cast<SketcherGui::ViewProviderSketch*> (doc->getInEdit());
             vp->purgeHandler();
-            vp->activateHandler(handler);
+            vp->activateHandler(ptr.release());
         }
     }
 }