diff --git a/sim/mn10300/dv-mn103tim.c b/sim/mn10300/dv-mn103tim.c
index 95ebc82b9e0..b1844a68e37 100644
--- a/sim/mn10300/dv-mn103tim.c
+++ b/sim/mn10300/dv-mn103tim.c
@@ -86,7 +86,7 @@ enum timer_register_types {
   TM6MDB,
   TM6CA,
   TM6CB,
-  LAST_TIMER_REG = TM6BC,
+  LAST_TIMER_REG = TM6CB,
 };