diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 0e92bf7..bac61db 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -147,6 +147,7 @@
 	KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
 	KERN_SPIN_RETRY=70,	/* int: number of spinlock retries */
 	KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
+	KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
 };