diff --git a/installation/Abaqus_mods/abaqus_v6.env b/installation/Abaqus_mods/abaqus_v6.env
index aa86a83c0..db3405fda 100644
--- a/installation/Abaqus_mods/abaqus_v6.env
+++ b/installation/Abaqus_mods/abaqus_v6.env
@@ -29,7 +29,7 @@ else:
 # Add the flag "-free" to the compile_fortran command below to use free-
 # format FORTRAN 90 syntax.
 compile_fortran = (fortCmd + " -c -fPIC -auto -extend_source -w90 -w95 " + 
-                   "-WB -I%I -free -heap-arrays 500000000 -O3 -fpp")
+                   "-WB -I%I -free -heap-arrays 500000000 -O3 -fpp -openmp")
 
 cae_no_parts_input_file=ON