diff --git a/src/Mod/PartDesign/Gui/TaskHoleParameters.cpp b/src/Mod/PartDesign/Gui/TaskHoleParameters.cpp
index 76b19103e..7b00e4d2b 100644
--- a/src/Mod/PartDesign/Gui/TaskHoleParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskHoleParameters.cpp
@@ -51,7 +51,6 @@ TaskHoleParameters::TaskHoleParameters(QWidget *parent)
     proxy = new QWidget(this);
     ui = new Ui_TaskHoleParameters();
     ui->setupUi(proxy);
-    ui->doubleSpinBox->setDecimals(Base::UnitsApi::getDecimals());
     QMetaObject::connectSlotsByName(this);
 
     this->groupLayout()->addWidget(proxy);
diff --git a/src/Mod/PartDesign/Gui/TaskHoleParameters.ui b/src/Mod/PartDesign/Gui/TaskHoleParameters.ui
index c761f21db..cc4244c04 100644
--- a/src/Mod/PartDesign/Gui/TaskHoleParameters.ui
+++ b/src/Mod/PartDesign/Gui/TaskHoleParameters.ui
@@ -54,12 +54,23 @@
       </widget>
      </item>
      <item>
-      <widget class="QDoubleSpinBox" name="doubleSpinBox"/>
+      <widget class="Gui::QuantitySpinBox" name="doubleSpinBox">
+       <property name="unit" stdset="0">
+        <string>mm</string>
+       </property>
+      </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>Gui::QuantitySpinBox</class>
+   <extends>QWidget</extends>
+   <header>Gui/QuantitySpinBox.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>