diff --git a/installation/mods_Abaqus/abaqus_v6.env b/installation/mods_Abaqus/abaqus_v6.env
index 590ed1b3e..c72ac06ea 100644
--- a/installation/mods_Abaqus/abaqus_v6.env
+++ b/installation/mods_Abaqus/abaqus_v6.env
@@ -34,7 +34,7 @@ else:
 # "-fpp"          use FORTRAN preprocessor on source code
 # "-openmp"       build with openMP support
 
-compile_fortran = (fortCmd + " -c -fPIC -auto -extend_source -w90 -w95 " + 
+compile_fortran = (fortCmd + " -c -fPIC -auto -w90 -w95 " + 
                    "-WB -I%I -free -heap-arrays 500000000 -O3 -fpp -openmp")
 
 # Do not use parts in input file