diff --git a/mt7615/pci.c b/mt7615/pci.c
index 10a249e1..e731b2bf 100644
--- a/mt7615/pci.c
+++ b/mt7615/pci.c
@@ -34,7 +34,7 @@ void mt7615_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
 	mt7615_irq_enable(dev, MT_INT_RX_DONE(q));
 }
 
-irqreturn_t mt7615_irq_handler(int irq, void *dev_instance)
+static irqreturn_t mt7615_irq_handler(int irq, void *dev_instance)
 {
 	struct mt7615_dev *dev = dev_instance;
 	u32 intr;