diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 8cf0c5901f95870fc613edba0289594a5d40640a..67f25ac29025c53903cc724fac62efdd94828510 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -879,7 +879,7 @@ void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
 {
 	const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
 	char *irq_str;
-	char irq_num[4];
+	char irq_num[8];
 
 	switch(phydev->irq) {
 	case PHY_POLL: