diff --git a/src/Need/mcfm_omp.f b/src/Need/mcfm_omp.f
index 5410002..56862d2 100644
--- a/src/Need/mcfm_omp.f
+++ b/src/Need/mcfm_omp.f
@@ -1,8 +1,8 @@
       program mcfm
+          use omp_lib
       implicit none
       
       include 'types.f'
-      include "omp_lib.h"
       include 'mpicommon.f'
 
       integer:: t,threadmin,threadmax,trials,trial