diff --git a/progs/xdemos/glxcontexts.c b/progs/xdemos/glxcontexts.c
index a9ff326ed5e..a97b62a9081 100644
--- a/progs/xdemos/glxcontexts.c
+++ b/progs/xdemos/glxcontexts.c
@@ -385,6 +385,10 @@ draw( Display *dpy, Window win )
    } else
       do_draw();
 
+   glDeleteLists(gear1, 1);
+   glDeleteLists(gear2, 1);
+   glDeleteLists(gear3, 1);
+
    glXSwapBuffers(dpy, win);
    glXDestroyContext(dpy, ctx);
 }