diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 4074244c71834f2b2648395437b95a95a7c9fe9b..4ea5fcccac02d1ee6f933cc1e5b8b8e0260da3a4 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -70,9 +70,7 @@ static int orion_wdt_start(struct watchdog_device *wdt_dev)
 	writel(wdt_tclk * wdt_dev->timeout, wdt_reg + WDT_VAL);
 
 	/* Clear watchdog timer interrupt */
-	reg = readl(BRIDGE_CAUSE);
-	reg &= ~WDT_INT_REQ;
-	writel(reg, BRIDGE_CAUSE);
+	writel(~WDT_INT_REQ, BRIDGE_CAUSE);
 
 	/* Enable watchdog timer */
 	reg = readl(wdt_reg + TIMER_CTRL);