diff --git a/bindings/python_internal/configuration.i b/bindings/python_internal/configuration.i
index c8781b92c..0a98016f3 100644
--- a/bindings/python_internal/configuration.i
+++ b/bindings/python_internal/configuration.i
@@ -302,7 +302,7 @@ namespace tigl
 %include "CTiglStringerFrameBorderedObject.h"
 %include "generated/CPACSSkinSegment.h"
 %include "CCPACSSkinSegment.h"
-%boost_optional(CCPACSSkin)
+%boost_optional(tigl::CCPACSSkin)
 %include "generated/CPACSSkin.h"
 %include "CCPACSSkin.h"
 %include "generated/CPACSCargoDoorsAssembly.h"