diff --git a/drivers/serial/uart_sedi.c b/drivers/serial/uart_sedi.c
index 1bee633b36c..d0ef1e0285a 100644
--- a/drivers/serial/uart_sedi.c
+++ b/drivers/serial/uart_sedi.c
@@ -123,6 +123,7 @@ struct uart_sedi_drv_data {
 	uint8_t busy_count;
 };
 
+#ifndef CONFIG_PM_DEVICE_RUNTIME
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 static void uart_busy_set(const struct device *dev)
 {
@@ -148,6 +149,7 @@ static void uart_busy_clear(const struct device *dev)
 	}
 }
 #endif
+#endif
 
 #ifdef CONFIG_PM_DEVICE