diff --git a/cmd/mdio.c b/cmd/mdio.c
index fb13d05075..21dc103736 100644
--- a/cmd/mdio.c
+++ b/cmd/mdio.c
@@ -27,12 +27,12 @@ static uint last_reg_hi;
 static int extract_range(char *input, int *plo, int *phi)
 {
 	char *end;
-	*plo = simple_strtol(input, &end, 0);
+	*plo = simple_strtol(input, &end, 16);
 	if (end == input)
 		return -1;
 
 	if ((*end == '-') && *(++end))
-		*phi = simple_strtol(end, NULL, 0);
+		*phi = simple_strtol(end, NULL, 16);
 	else if (*end == '\0')
 		*phi = *plo;
 	else
@@ -79,7 +79,7 @@ static int mdio_read_ranges(struct phy_device *phydev, struct mii_dev *bus,
 
 	printf("Reading from bus %s\n", bus->name);
 	for (addr = addrlo; addr <= addrhi; addr++) {
-		printf("PHY at address %d:\n", addr);
+		printf("PHY at address %x:\n", addr);
 
 		for (devad = devadlo; devad <= devadhi; devad++) {
 			for (reg = reglo; reg <= reghi; reg++) {
diff --git a/common/miiphyutil.c b/common/miiphyutil.c
index d8ebb384db..aca18db52a 100644
--- a/common/miiphyutil.c
+++ b/common/miiphyutil.c
@@ -135,7 +135,7 @@ void mdio_list_devices(void)
 			struct phy_device *phydev = bus->phymap[i];
 
 			if (phydev) {
-				printf("%d - %s", i, phydev->drv->name);
+				printf("%x - %s", i, phydev->drv->name);
 
 				if (phydev->dev)
 					printf(" <--> %s\n", phydev->dev->name);
diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c
index 3319e10467..526eac658a 100644
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -706,7 +706,7 @@ static int zynq_gem_ofdata_to_platdata(struct udevice *dev)
 
 	priv->emio = fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "xlnx,emio");
 
-	printf("ZYNQ GEM: %lx, phyaddr %d, interface %s\n", (ulong)priv->iobase,
+	printf("ZYNQ GEM: %lx, phyaddr %x, interface %s\n", (ulong)priv->iobase,
 	       priv->phyaddr, phy_string_for_interface(priv->interface));
 
 	return 0;