diff --git a/subsys/modbus/modbus_serial.c b/subsys/modbus/modbus_serial.c
index 0289c001bc6..97f44adcd73 100644
--- a/subsys/modbus/modbus_serial.c
+++ b/subsys/modbus/modbus_serial.c
@@ -389,7 +389,7 @@ static void uart_cb_handler(const struct device *dev, void *app_data)
 
 	cfg = ctx->cfg;
 
-	while (uart_irq_update(cfg->dev) && uart_irq_is_pending(cfg->dev)) {
+	if (uart_irq_update(cfg->dev) && uart_irq_is_pending(cfg->dev)) {
 
 		if (uart_irq_rx_ready(cfg->dev)) {
 			cb_handler_rx(ctx);