diff --git a/drivers/serial/uart_pl011_ambiq.h b/drivers/serial/uart_pl011_ambiq.h
index 5866ff730f5..181a020614a 100644
--- a/drivers/serial/uart_pl011_ambiq.h
+++ b/drivers/serial/uart_pl011_ambiq.h
@@ -186,6 +186,7 @@ static int uart_ambiq_pm_action(const struct device *dev, enum pm_device_action
 #else
 #define DEVPWRSTATUS_OFFSET 0x4
 #define AMBIQ_UART_DEFINE(n)                                                                       \
+	PM_DEVICE_DT_INST_DEFINE(n, uart_ambiq_pm_action);                                         \
 	static int pwr_on_ambiq_uart_##n(void)                                                     \
 	{                                                                                          \
 		uint32_t addr = DT_REG_ADDR(DT_INST_PHANDLE(n, ambiq_pwrcfg)) +                    \