diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index e6c96ceae9..7ad718e9db 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -288,7 +288,7 @@ const std::weak_ptr<GeometryExtension> Geometry::getExtension(Base::Type type) c
     throw Base::ValueError("No geometry extension of the requested type.");
 }
 
-void Geometry::setExtension(std::unique_ptr<GeometryExtension> geo)
+void Geometry::setExtension(std::unique_ptr<GeometryExtension> && geo)
 {
     bool hasext=false;
 
diff --git a/src/Mod/Part/App/Geometry.h b/src/Mod/Part/App/Geometry.h
index c8e4a1d678..2334c6dd75 100644
--- a/src/Mod/Part/App/Geometry.h
+++ b/src/Mod/Part/App/Geometry.h
@@ -101,7 +101,7 @@ public:
 
     bool hasExtension(Base::Type type) const;
     const std::weak_ptr<GeometryExtension> getExtension(Base::Type type) const;
-    void setExtension(std::unique_ptr<GeometryExtension> geo);
+    void setExtension(std::unique_ptr<GeometryExtension> &&geo);
 
 protected:
     /// create a new tag for the geometry object