diff --git a/Xdmf.i b/Xdmf.i
index 88f228d5559086998fc22b497b58334e571f8373..badd577c3474b243a14027534f1392a98c5e03d0 100644
--- a/Xdmf.i
+++ b/Xdmf.i
@@ -8,6 +8,7 @@ swig -v -c++ -python -o XdmfPython.cpp Xdmf.i
 
 %module Xdmf
 %{
+    #define SWIGPY_SLICE_ARG(obj) ((PySliceObject*) (obj))
 
     // MPI Includes
     #include <mpi.h>
@@ -71,6 +72,7 @@ swig -v -c++ -python -o XdmfPython.cpp Xdmf.i
 #else
 %module Xdmf
 %{
+    #define SWIGPY_SLICE_ARG(obj) ((PySliceObject*) (obj))
 
     // XdmfCore Includes
     #include <Xdmf.hpp>