diff --git a/target/linux/ramips/mt76x8/config-5.15 b/target/linux/ramips/mt76x8/config-5.15
index bd1d3688b82..6d6759a7c58 100644
--- a/target/linux/ramips/mt76x8/config-5.15
+++ b/target/linux/ramips/mt76x8/config-5.15
@@ -162,6 +162,7 @@ CONFIG_REGMAP_MMIO=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_RESET_CONTROLLER=y
+CONFIG_RTC_CLASS=y
 CONFIG_SERIAL_8250_NR_UARTS=3
 CONFIG_SERIAL_8250_RUNTIME_UARTS=3
 CONFIG_SERIAL_MCTRL_GPIO=y