diff --git a/ThirdParty/mpi4py/vtkmpi4py/src/lib-mpi/config/openmpi.h b/ThirdParty/mpi4py/vtkmpi4py/src/lib-mpi/config/openmpi.h
index 3173831..e8ee74b 100644
--- a/ThirdParty/mpi4py/vtkmpi4py/src/lib-mpi/config/openmpi.h
+++ b/ThirdParty/mpi4py/vtkmpi4py/src/lib-mpi/config/openmpi.h
@@ -141,4 +141,9 @@
 
 #endif
 
+ #if OMPI_NUMVERSION >= 40000
+ #undef  PyMPI_HAVE_MPI_LB
+ #undef  PyMPI_HAVE_MPI_UB
+ #endif /* OMPI >= 4.0.0 */
+
 #endif /* !PyMPI_CONFIG_OPENMPI_H */
