diff --git a/arch/ia64/sn/kernel/sn2/timer_interrupt.c b/arch/ia64/sn/kernel/sn2/timer_interrupt.c
index cde7375390b0..adf5db2e2afe 100644
--- a/arch/ia64/sn/kernel/sn2/timer_interrupt.c
+++ b/arch/ia64/sn/kernel/sn2/timer_interrupt.c
@@ -1,7 +1,7 @@
 /*
  *
  *
- * Copyright (c) 2003 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
  * 
  * This program is free software; you can redistribute it and/or modify it 
  * under the terms of version 2 of the GNU General Public License 
@@ -50,14 +50,16 @@ void sn_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 			     LED_CPU_HEARTBEAT, LED_CPU_HEARTBEAT);
 	}
 
-	if (enable_shub_wars_1_1()) {
-		/* Bugfix code for SHUB 1.1 */
-		if (pda->pio_shub_war_cam_addr)
-			*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
+	if (is_shub1()) {
+		if (enable_shub_wars_1_1()) {
+			/* Bugfix code for SHUB 1.1 */
+			if (pda->pio_shub_war_cam_addr)
+				*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
+		}
+		if (pda->sn_lb_int_war_ticks == 0)
+			sn_lb_int_war_check();
+		pda->sn_lb_int_war_ticks++;
+		if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
+			pda->sn_lb_int_war_ticks = 0;
 	}
-	if (pda->sn_lb_int_war_ticks == 0)
-		sn_lb_int_war_check();
-	pda->sn_lb_int_war_ticks++;
-	if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
-		pda->sn_lb_int_war_ticks = 0;
 }