diff --git a/src/bin/psql/print.c b/src/bin/psql/print.c
index dec440c264..594a63acfd 100644
--- a/src/bin/psql/print.c
+++ b/src/bin/psql/print.c
@@ -1210,8 +1210,8 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 	 * We now have all the information we need to setup the formatting
 	 * structures
 	 */
-	dlineptr = pg_local_malloc((sizeof(*dlineptr) + 1) * dheight);
-	hlineptr = pg_local_malloc((sizeof(*hlineptr) + 1) * hheight);
+	dlineptr = pg_local_malloc((sizeof(*dlineptr)) * (dheight + 1));
+	hlineptr = pg_local_malloc((sizeof(*hlineptr)) * (hheight + 1));
 
 	dlineptr->ptr = pg_local_malloc(dformatsize);
 	hlineptr->ptr = pg_local_malloc(hformatsize);