diff --git a/adb/usb_osx.cpp b/adb/usb_osx.cpp
index 2ba3ff7d6..0ce85f35c 100644
--- a/adb/usb_osx.cpp
+++ b/adb/usb_osx.cpp
@@ -118,7 +118,7 @@ AndroidInterfaceAdded(void *refCon, io_iterator_t iterator)
     IOUSBDeviceInterface197  **dev = NULL;
     HRESULT                  result;
     SInt32                   score;
-    UInt32                   locationId;
+    uint32_t                 locationId;
     UInt8                    if_class, subclass, protocol;
     UInt16                   vendor;
     UInt16                   product;