diff --git a/src/Mod/Part/App/FeatureChamfer.h b/src/Mod/Part/App/FeatureChamfer.h
index 48212d1618..b9fe53108d 100644
--- a/src/Mod/Part/App/FeatureChamfer.h
+++ b/src/Mod/Part/App/FeatureChamfer.h
@@ -29,7 +29,7 @@
 namespace Part
 {
 
-class Chamfer : public Part::FilletBase
+class PartExport Chamfer : public Part::FilletBase
 {
     PROPERTY_HEADER_WITH_OVERRIDE(Part::Chamfer);
 
diff --git a/src/Mod/Part/App/FeatureFillet.h b/src/Mod/Part/App/FeatureFillet.h
index bf3013aa85..08d79f593e 100644
--- a/src/Mod/Part/App/FeatureFillet.h
+++ b/src/Mod/Part/App/FeatureFillet.h
@@ -29,7 +29,7 @@
 namespace Part
 {
 
-class Fillet : public Part::FilletBase
+class PartExport Fillet : public Part::FilletBase
 {
     PROPERTY_HEADER_WITH_OVERRIDE(Part::Fillet);
 
diff --git a/src/Mod/Part/App/PartFeatures.h b/src/Mod/Part/App/PartFeatures.h
index 6eef704111..dacb2cd5b9 100644
--- a/src/Mod/Part/App/PartFeatures.h
+++ b/src/Mod/Part/App/PartFeatures.h
@@ -32,7 +32,7 @@
 namespace Part
 {
 
-class RuledSurface : public Part::Feature
+class PartExport RuledSurface : public Part::Feature
 {
     PROPERTY_HEADER_WITH_OVERRIDE(Part::RuledSurface);
 
@@ -64,7 +64,7 @@ private:
     static const char* OrientationEnums[];
 };
 
-class Loft : public Part::Feature
+class PartExport Loft : public Part::Feature
 {
     PROPERTY_HEADER_WITH_OVERRIDE(Part::Loft);
 
@@ -96,7 +96,7 @@ private:
     static App::PropertyIntegerConstraint::Constraints Degrees;
 };
 
-class Sweep : public Part::Feature
+class PartExport Sweep : public Part::Feature
 {
     PROPERTY_HEADER_WITH_OVERRIDE(Part::Sweep);