diff --git a/lib/memory.c b/lib/memory.c
index 28bbdc1..3b87fcc 100644
--- a/lib/memory.c
+++ b/lib/memory.c
@@ -569,6 +569,7 @@
   install_element (ENABLE_NODE, &show_memory_bgp_cmd);
   install_element (ENABLE_NODE, &show_memory_ospf_cmd);
   install_element (ENABLE_NODE, &show_memory_ospf6_cmd);
+  install_element (ENABLE_NODE, &show_memory_isis_cmd);
   install_element (ENABLE_NODE, &show_memory_pim_cmd);
 }