diff --git a/v2.3/toolkit/pyext/fastnlo.i b/v2.3/toolkit/pyext/fastnlo.i
index 782f48251a2a20ea424508918fc319fdf0c764c9..93536f3757362f3810ebe63cb9418aff40d35063 100644
--- a/v2.3/toolkit/pyext/fastnlo.i
+++ b/v2.3/toolkit/pyext/fastnlo.i
@@ -47,7 +47,7 @@ namespace std {
 %}
 %include "../fastnlotoolkit/include/fastnlotk/speaker.h"
 %include "../fastnlotoolkit/include/fastnlotk/fastNLOPDFLinearCombinations.h"
-%include "../fastnlotoolkit/include/fastnlotk/fastNLOConstants.h"
+//%include "../fastnlotoolkit/include/fastnlotk/fastNLOConstants.h"
 %include "../fastnlotoolkit/include/fastnlotk/fastNLOTable.h"
 %include "../fastnlotoolkit/include/fastnlotk/fastNLOReader.h"
 %include "../fastnlotoolkit/include/fastnlotk/fastNLOLHAPDF.h"