diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index b12a5d58546f..37199b9b2cfa 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -86,7 +86,7 @@ int aic_common_set_priority(int priority, unsigned *val)
 	    priority > AT91_AIC_IRQ_MAX_PRIORITY)
 		return -EINVAL;
 
-	*val &= AT91_AIC_PRIOR;
+	*val &= ~AT91_AIC_PRIOR;
 	*val |= priority;
 
 	return 0;