diff --git a/target/linux/realtek/patches-6.12/700-dsa-mdio-increase-max-ports-for-rtl839x-rtl931x.patch b/target/linux/realtek/patches-6.12/700-dsa-mdio-increase-max-ports-for-rtl839x-rtl931x.patch
index 3db46a22853..1485b79263f 100644
--- a/target/linux/realtek/patches-6.12/700-dsa-mdio-increase-max-ports-for-rtl839x-rtl931x.patch
+++ b/target/linux/realtek/patches-6.12/700-dsa-mdio-increase-max-ports-for-rtl839x-rtl931x.patch
@@ -130,3 +130,23 @@ Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
  		return ds->ops->phy_write(ds, addr, reg, val);
  
  	return 0;
+--- a/drivers/net/phy/mdio_bus.c
++++ b/drivers/net/phy/mdio_bus.c
+@@ -611,7 +611,7 @@ static int mdiobus_scan_bus_c22(struct m
+ 	int i;
+ 
+ 	for (i = 0; i < PHY_MAX_ADDR; i++) {
+-		if ((bus->phy_mask & BIT(i)) == 0) {
++		if ((bus->phy_mask & BIT_ULL(i)) == 0ULL) {
+ 			struct phy_device *phydev;
+ 
+ 			phydev = mdiobus_scan_c22(bus, i);
+@@ -627,7 +627,7 @@ static int mdiobus_scan_bus_c45(struct m
+ 	int i;
+ 
+ 	for (i = 0; i < PHY_MAX_ADDR; i++) {
+-		if ((bus->phy_mask & BIT(i)) == 0) {
++		if ((bus->phy_mask & BIT_ULL(i)) == 0ULL) {
+ 			struct phy_device *phydev;
+ 
+ 			/* Don't scan C45 if we already have a C22 device */