diff --git a/samples/advanced/MixedPrec/Makefile b/samples/advanced/MixedPrec/Makefile
index 3e9a970b..8a24ed17 100644
--- a/samples/advanced/MixedPrec/Makefile
+++ b/samples/advanced/MixedPrec/Makefile
@@ -26,7 +26,7 @@ dir:
 	(if test ! -d $(EXEDIR); then mkdir $(EXEDIR); fi)
 
 amg_d_pde3d: amg_d_pde3d.o amg_d_genpde_mod.o $(DGEN3D) $(PSBMIXED) data_input.o
-	$(FLINK) $(LINKOPT) amg_d_pde3d.o  amg_d_genpde_mod.o $(DGEN3D) data_input.o \
+	$(FLINK) $(LINKOPT) amg_d_pde3d.o  amg_d_genpde_mod.o $(DGEN3D) $(PSBMIXED) data_input.o \
          -o amg_d_pde3d $(AMG_LIBS) $(PSBLAS_LIBS) $(AMG_LDLIBS) $(LDLIBS)
 	/bin/mv amg_d_pde3d $(EXEDIR)
 
diff --git a/samples/advanced/MixedPrec/amg_d_pde3d.F90 b/samples/advanced/MixedPrec/amg_d_pde3d.F90
index 2911b576..d69d97d7 100644
--- a/samples/advanced/MixedPrec/amg_d_pde3d.F90
+++ b/samples/advanced/MixedPrec/amg_d_pde3d.F90
@@ -93,6 +93,7 @@ program amg_d_pde3d
 
   ! sparse matrix and preconditioner
   type(psb_dspmat_type) :: a
+  type(psb_sspmat_type) :: asingle
   type(amg_dprec_type)  :: prec
   ! descriptor
   type(psb_desc_type)   :: desc_a
@@ -286,6 +287,7 @@ program amg_d_pde3d
     goto 9999
   end select
 
+  call psb_d2s_cscnv(a,asingle,info,type=afmt)
 
   call psb_barrier(ctxt)
   tpgen = psb_wtime() - t1