diff --git a/src/Need/mcfm_mpi.f b/src/Need/mcfm_mpi.f
index 638f4c3..025f311 100644
--- a/src/Need/mcfm_mpi.f
+++ b/src/Need/mcfm_mpi.f
@@ -1,8 +1,9 @@
       program mcfm
+          use omp_lib
       implicit none
       include 'types.f'
       include 'mpif.h'
-      include "omp_lib.h"
+      !include "omp_lib.h"
       include 'mpicommon.f'
       integer ierr,mylen,support
       character (len=mpi_max_processor_name)::procname