diff --git a/src/Prs3d/Prs3d_DatumAspect.hxx b/src/Prs3d/Prs3d_DatumAspect.hxx
index cf8bf24816..09f706c4e3 100644
--- a/src/Prs3d/Prs3d_DatumAspect.hxx
+++ b/src/Prs3d/Prs3d_DatumAspect.hxx
@@ -79,7 +79,7 @@ public:
   }
 
   //! Returns primitives.
-  Handle(Graphic3d_ArrayOfPrimitives) ArrayOfPrimitives(const Prs3d_DatumParts& thePart) const;
+  Standard_EXPORT Handle(Graphic3d_ArrayOfPrimitives) ArrayOfPrimitives(const Prs3d_DatumParts& thePart) const;
 
   //! Updates graphic groups for the current datum mode
   //! Parameters of datum position and orientation