diff --git a/drivers/usb/host/ohci-sunxi.c b/drivers/usb/host/ohci-sunxi.c
index 2a1e8bf..0689374 100644
--- a/drivers/usb/host/ohci-sunxi.c
+++ b/drivers/usb/host/ohci-sunxi.c
@@ -51,7 +51,7 @@
 	extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
 #endif
 	priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
-	priv->phy_index = ((u32)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
+	priv->phy_index = ((uintptr_t)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
 	priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
 	extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
 	priv->usb_gate_mask <<= priv->phy_index;