diff --git a/src/grid/grid_mech_FEM.f90 b/src/grid/grid_mech_FEM.f90
index 282c6ea13..7d0830f67 100644
--- a/src/grid/grid_mech_FEM.f90
+++ b/src/grid/grid_mech_FEM.f90
@@ -13,6 +13,7 @@ module grid_mech_FEM
   use prec
   use parallelization
   use DAMASK_interface
+  use IO
   use HDF5_utilities
   use math
   use spectral_utilities
diff --git a/src/grid/grid_mech_spectral_basic.f90 b/src/grid/grid_mech_spectral_basic.f90
index 139f18e84..8677a998f 100644
--- a/src/grid/grid_mech_spectral_basic.f90
+++ b/src/grid/grid_mech_spectral_basic.f90
@@ -13,6 +13,7 @@ module grid_mech_spectral_basic
   use prec
   use parallelization
   use DAMASK_interface
+  use IO
   use HDF5_utilities
   use math
   use spectral_utilities
diff --git a/src/grid/grid_mech_spectral_polarisation.f90 b/src/grid/grid_mech_spectral_polarisation.f90
index 1400393f4..ca92f62f4 100644
--- a/src/grid/grid_mech_spectral_polarisation.f90
+++ b/src/grid/grid_mech_spectral_polarisation.f90
@@ -13,6 +13,7 @@ module grid_mech_spectral_polarisation
   use prec
   use parallelization
   use DAMASK_interface
+  use IO
   use HDF5_utilities
   use math
   use spectral_utilities