diff --git a/ps/ps.map/ps_vlines.c b/ps/ps.map/ps_vlines.c
index c5aced7c51b..fb3bc2fa760 100644
--- a/ps/ps.map/ps_vlines.c
+++ b/ps/ps.map/ps_vlines.c
@@ -206,5 +206,8 @@ int PS_vlines_plot(struct Map_info *P_map, int vec, int type)
     }
     fprintf(PS.fp, "\n");
     fprintf(PS.fp, "0 setlinejoin\n"); /* reset line join to miter */
+    Vect_destroy_line_struct(Points);
+    Vect_destroy_line_struct(nPoints);
+    Vect_destroy_cats_struct(Cats);
     return 0;
 }