diff --git a/src/Mod/Part/Gui/Mirroring.cpp b/src/Mod/Part/Gui/Mirroring.cpp
index 991c49e0dc..e8f94eaa96 100644
--- a/src/Mod/Part/Gui/Mirroring.cpp
+++ b/src/Mod/Part/Gui/Mirroring.cpp
@@ -370,4 +370,9 @@ bool TaskMirroring::accept()
     return widget->accept();
 }
 
+bool TaskMirroring::reject()
+{
+    return widget->reject();
+}
+
 #include "moc_Mirroring.cpp"
diff --git a/src/Mod/Part/Gui/Mirroring.h b/src/Mod/Part/Gui/Mirroring.h
index 5d0ab74f44..1153f27c01 100644
--- a/src/Mod/Part/Gui/Mirroring.h
+++ b/src/Mod/Part/Gui/Mirroring.h
@@ -67,6 +67,7 @@ public:
 
 public:
     bool accept() override;
+    bool reject() override;
 
     QDialogButtonBox::StandardButtons getStandardButtons() const override
     { return QDialogButtonBox::Ok | QDialogButtonBox::Cancel; }