Index: wannier90-3.1.0/config/make.inc.gfort
===================================================================
--- wannier90-3.1.0.orig/config/make.inc.gfort
+++ wannier90-3.1.0/config/make.inc.gfort
@@ -7,7 +7,7 @@ F90 = gfortran
 #COMMS  = mpi
 #MPIF90 = mpgfortran #mpif90
 
-FCOPTS = -O3
+FCOPTS = -O3 -fallow-argument-mismatch
 LDOPTS =
 
 #Next two lines are good for debugging
Index: wannier90-3.1.0/config/make.inc.gfort.dynlib
===================================================================
--- wannier90-3.1.0.orig/config/make.inc.gfort.dynlib
+++ wannier90-3.1.0/config/make.inc.gfort.dynlib
@@ -7,7 +7,7 @@ F90 = gfortran
 #COMMS  = mpi
 #MPIF90 = mpgfortran #mpif90
 
-FCOPTS = -O3 -fPIC
+FCOPTS = -O3 -fPIC -fallow-argument-mismatch
 LDOPTS = -fPIC
 
 #Next two lines are good for debugging