diff --git a/target/linux/realtek/rtl931x/config-6.12 b/target/linux/realtek/rtl931x/config-6.12
index 8cadfb6a5a7..8d79bcbec22 100644
--- a/target/linux/realtek/rtl931x/config-6.12
+++ b/target/linux/realtek/rtl931x/config-6.12
@@ -203,7 +203,7 @@ CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_RANDSTRUCT_NONE=y
 CONFIG_RATIONAL=y
-# CONFIG_REALTEK_OTTO_TIMER is not set
+CONFIG_REALTEK_OTTO_TIMER=y
 CONFIG_REALTEK_OTTO_WDT=y
 CONFIG_REALTEK_SOC_PHY=y
 CONFIG_REGMAP=y