diff --git a/xen/arch/ia64/linux-xen/entry.S b/xen/arch/ia64/linux-xen/entry.S
index 6519c64894..99a0b43200 100644
--- a/xen/arch/ia64/linux-xen/entry.S
+++ b/xen/arch/ia64/linux-xen/entry.S
@@ -1555,7 +1555,7 @@ ia64_hypercall_table:
 	data8 do_sysctl			/*  */                  /* 35 */
 	data8 do_domctl			/*  */
 	data8 do_kexec_op		/*  */
-	data8 do_ni_hypercall		/*  */
+	data8 do_tmem_op		/*  */
 	data8 do_ni_hypercall		/*  */
 	data8 do_ni_hypercall		/*  */                 /* 40 */
 	data8 do_ni_hypercall		/*  */