diff --git a/src/Mod/Part/Gui/TaskSweep.cpp b/src/Mod/Part/Gui/TaskSweep.cpp
index 28bc3c00f72d..f3f4fd0903d4 100644
--- a/src/Mod/Part/Gui/TaskSweep.cpp
+++ b/src/Mod/Part/Gui/TaskSweep.cpp
@@ -84,7 +84,7 @@ class SweepWidget::Private
         bool allow(App::Document* /*pDoc*/, App::DocumentObject*pObj, const char*sSubName)
         {
             if (pObj->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
-                if (!sSubName) {
+                if (!sSubName || sSubName[0] == '\0') {
                     // If selecting again the same edge the passed sub-element is empty. If the whole
                     // shape is an edge or wire we can use it completely.
                     const TopoDS_Shape& shape = static_cast<Part::Feature*>(pObj)->Shape.getValue();