diff --git a/src/Gui/Inventor/Draggers/Gizmo.cpp b/src/Gui/Inventor/Draggers/Gizmo.cpp
index ad6bba3988..81f3e020aa 100644
--- a/src/Gui/Inventor/Draggers/Gizmo.cpp
+++ b/src/Gui/Inventor/Draggers/Gizmo.cpp
@@ -178,9 +178,8 @@ SoLinearDraggerContainer* LinearGizmo::getDraggerContainer()
 
 void LinearGizmo::setProperty(QuantitySpinBox* property)
 {
-    if (quantityChangedConnection) {
-        QuantitySpinBox::disconnect(quantityChangedConnection);
-    }
+    QuantitySpinBox::disconnect(quantityChangedConnection);
+    QuantitySpinBox::disconnect(formulaDialogConnection);
 
     this->property = property;
     quantityChangedConnection = QuantitySpinBox::connect(
@@ -189,7 +188,7 @@ void LinearGizmo::setProperty(QuantitySpinBox* property)
             setDragLength(value);
         }
     );
-    quantityChangedConnection = QuantitySpinBox::connect(
+    formulaDialogConnection = QuantitySpinBox::connect(
         property, &Gui::QuantitySpinBox::showFormulaDialog,
         [this] (bool) {
             // This will set the visibility of the actual geometry to true or false
@@ -452,9 +451,8 @@ void RotationGizmo::orientAlongCamera(SoCamera* camera)
 
 void RotationGizmo::setProperty(QuantitySpinBox* property)
 {
-    if (quantityChangedConnection) {
-        QuantitySpinBox::disconnect(quantityChangedConnection);
-    }
+    QuantitySpinBox::disconnect(quantityChangedConnection);
+    QuantitySpinBox::disconnect(formulaDialogConnection);
 
     this->property = property;
     quantityChangedConnection = QuantitySpinBox::connect(
@@ -463,7 +461,7 @@ void RotationGizmo::setProperty(QuantitySpinBox* property)
             setRotAngle(value);
         }
     );
-    quantityChangedConnection = QuantitySpinBox::connect(
+    formulaDialogConnection = QuantitySpinBox::connect(
         property, &Gui::QuantitySpinBox::showFormulaDialog,
         [this] (bool) {
             // This will set the visibility of the actual geometry to true or false
diff --git a/src/Gui/Inventor/Draggers/Gizmo.h b/src/Gui/Inventor/Draggers/Gizmo.h
index a87a98ff19..9a7dc8e5f1 100644
--- a/src/Gui/Inventor/Draggers/Gizmo.h
+++ b/src/Gui/Inventor/Draggers/Gizmo.h
@@ -85,7 +85,6 @@ protected:
     double initialValue;
 
     bool visible = true;
-    bool hasExpression = false;
 };
 
 class GuiExport LinearGizmo: public Gizmo
@@ -115,6 +114,7 @@ private:
     SoLinearDragger* dragger = nullptr;
     SoLinearDraggerContainer* draggerContainer = nullptr;
     QMetaObject::Connection quantityChangedConnection;
+    QMetaObject::Connection formulaDialogConnection;
 
     void draggingStarted();
     void draggingFinished();
@@ -160,6 +160,7 @@ private:
     LinearGizmo* linearGizmo = nullptr;
     bool automaticOrientation = false;
     QMetaObject::Connection quantityChangedConnection;
+    QMetaObject::Connection formulaDialogConnection;
 
     void draggingStarted();
     void draggingFinished();