diff --git a/src/Mod/Part/App/FeatureProjectOnSurface.h b/src/Mod/Part/App/FeatureProjectOnSurface.h
index 5d3c5e00ac..a48f80dd99 100644
--- a/src/Mod/Part/App/FeatureProjectOnSurface.h
+++ b/src/Mod/Part/App/FeatureProjectOnSurface.h
@@ -33,7 +33,7 @@
 namespace Part
 {
 
-class ProjectOnSurface : public Part::Feature
+class PartExport ProjectOnSurface : public Part::Feature
 {
     PROPERTY_HEADER_WITH_OVERRIDE(ProjectOnSurface);