diff --git a/src/Mod/Part/App/FeaturePartCircle.h b/src/Mod/Part/App/FeaturePartCircle.h
index dc9400204a7d..4a5a1f5cdca2 100644
--- a/src/Mod/Part/App/FeaturePartCircle.h
+++ b/src/Mod/Part/App/FeaturePartCircle.h
@@ -29,7 +29,7 @@
 
 namespace Part
 {
-class Circle : public Part::Primitive
+class PartExport Circle : public Part::Primitive
 {
     PROPERTY_HEADER(Part::Circle);
 
diff --git a/src/Mod/Part/App/PrimitiveFeature.h b/src/Mod/Part/App/PrimitiveFeature.h
index 4328cd77ffdb..287db148ac6b 100644
--- a/src/Mod/Part/App/PrimitiveFeature.h
+++ b/src/Mod/Part/App/PrimitiveFeature.h
@@ -391,7 +391,7 @@ class PartExport Wedge : public Primitive
     void onChanged(const App::Property* prop);
 };
 
-class Ellipse : public Part::Primitive
+class PartExport Ellipse : public Part::Primitive
 {
     PROPERTY_HEADER(Part::Ellipse);