diff --git a/base/internals/Makefile b/base/internals/Makefile
index 86e8b5f6..17a199ff 100644
--- a/base/internals/Makefile
+++ b/base/internals/Makefile
@@ -4,7 +4,8 @@ FOBJS = psi_compute_size.o psi_crea_bnd_elem.o psi_crea_index.o \
         psi_crea_ovr_elem.o psi_bld_tmpovrl.o psi_dl_check.o \
 	psi_sort_dl.o \
 	psi_ldsc_pre_halo.o psi_bld_tmphalo.o psi_bld_g2lmap.o\
-	psi_sort_dl.o psi_idx_cnv.o psi_idx_ins_cnv.o
+	psi_sort_dl.o psi_idx_cnv.o psi_idx_ins_cnv.o \
+        psi_desc_impl.o psi_ovrl_restr.o psi_ovrl_save.o psi_ovrl_upd.o
 FOBJS2 = psi_exist_ovr_elem.o psi_list_search.o srtlist.o 
 #COBJS = avltree.o srcht.o
 
diff --git a/base/serial/psi_desc_impl.f90 b/base/internals/psi_desc_impl.f90
similarity index 100%
rename from base/serial/psi_desc_impl.f90
rename to base/internals/psi_desc_impl.f90
diff --git a/base/serial/psi_ovrl_restr.f90 b/base/internals/psi_ovrl_restr.f90
similarity index 100%
rename from base/serial/psi_ovrl_restr.f90
rename to base/internals/psi_ovrl_restr.f90
diff --git a/base/serial/psi_ovrl_save.f90 b/base/internals/psi_ovrl_save.f90
similarity index 100%
rename from base/serial/psi_ovrl_save.f90
rename to base/internals/psi_ovrl_save.f90
diff --git a/base/serial/psi_ovrl_upd.f90 b/base/internals/psi_ovrl_upd.f90
similarity index 100%
rename from base/serial/psi_ovrl_upd.f90
rename to base/internals/psi_ovrl_upd.f90
diff --git a/base/serial/Makefile b/base/serial/Makefile
index 37ee0005..8dd5292a 100644
--- a/base/serial/Makefile
+++ b/base/serial/Makefile
@@ -5,8 +5,7 @@ FOBJS = psb_lsame.o psi_serial_impl.o psb_sort_impl.o \
 	psb_srwextd.o psb_drwextd.o psb_crwextd.o psb_zrwextd.o \
 	psb_ssymbmm.o psb_dsymbmm.o psb_csymbmm.o psb_zsymbmm.o \
 	psb_snumbmm.o psb_dnumbmm.o psb_cnumbmm.o psb_znumbmm.o \
-	psb_dgeprt.o psi_desc_impl.o psi_ovrl_restr.o \
-        psi_ovrl_save.o psi_ovrl_upd.o
+	psb_dgeprt.o
 
 LIBDIR=..
 MODDIR=../modules