diff --git a/cbind/base/psb_base_cbind_mod.f90 b/cbind/base/psb_base_cbind_mod.f90
index f7d74e74..036e662a 100644
--- a/cbind/base/psb_base_cbind_mod.f90
+++ b/cbind/base/psb_base_cbind_mod.f90
@@ -11,4 +11,5 @@ module psb_base_cbind_mod
   use psb_c_comm_cbind_mod
   use psb_z_comm_cbind_mod
   use psb_base_psblas_cbind_mod
+  use psb_ext_mod
 end module psb_base_cbind_mod