diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 8a28b8e..e2fe42d 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -248,7 +248,7 @@
 	return NULL;
 }
 
-static struct phy *phy_get_by_index(struct device_d *dev, int index)
+static inline struct phy *phy_get_by_index(struct device_d *dev, int index)
 {
 	return ERR_PTR(-ENODEV);
 }