diff --git a/arch/arm/src/lm3s/lm3s_timerisr.c b/arch/arm/src/lm3s/lm3s_timerisr.c
index f063ee9c50..95b358df16 100644
--- a/arch/arm/src/lm3s/lm3s_timerisr.c
+++ b/arch/arm/src/lm3s/lm3s_timerisr.c
@@ -129,7 +129,7 @@ void up_timerinit(void)
 
   /* Attach the timer interrupt vector */
 
-  (void)irq_attach(LMSB_IRQ_SYSTICK, (xcpt_t)up_timerisr);
+  (void)irq_attach(LM3S_IRQ_SYSTICK, (xcpt_t)up_timerisr);
 
   /* Enable SysTick interrupts */
 
@@ -137,5 +137,5 @@ void up_timerinit(void)
 
   /* And enable the timer interrupt */
 
-  up_enable_irq(LMSB_IRQ_SYSTICK);
+  up_enable_irq(LM3S_IRQ_SYSTICK);
 }