diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index ff4fa25f9fd1..711bd1511439 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -921,7 +921,7 @@ static void handle_dma_error_intr(void *arg, uint32_t other_ir)
 {
 	struct ioc4_port *port = (struct ioc4_port *)arg;
 	struct hooks *hooks = port->ip_hooks;
-	unsigned int flags;
+	unsigned long flags;
 
 	spin_lock_irqsave(&port->ip_lock, flags);
 
@@ -1834,7 +1834,7 @@ static void handle_intr(void *arg, uint32_t sio_ir)
 	struct ioc4_port *port = (struct ioc4_port *)arg;
 	struct hooks *hooks = port->ip_hooks;
 	unsigned int rx_high_rd_aborted = 0;
-	unsigned int flags;
+	unsigned long flags;
 	struct uart_port *the_port;
 	int loop_counter;