diff --git a/src/ios-deploy/MobileDevice.h b/src/ios-deploy/MobileDevice.h
index 4c8e2c2..2646bcd 100644
--- a/src/ios-deploy/MobileDevice.h
+++ b/src/ios-deploy/MobileDevice.h
@@ -432,7 +432,7 @@
 mach_error_t AMDeviceDisconnect(struct am_device *device);
 mach_error_t AMDeviceRetain(struct am_device *device);
 mach_error_t AMDeviceRelease(struct am_device *device);
-CFStringRef AMDeviceCopyValue(struct am_device *device, unsigned int, CFStringRef cfstring);
+CFStringRef AMDeviceCopyValue(struct am_device *device, void*, CFStringRef cfstring);
 CFStringRef AMDeviceCopyDeviceIdentifier(struct am_device *device);
 
 typedef void (*notify_callback)(CFStringRef notification, void *data);
diff --git a/src/ios-deploy/ios-deploy.m b/src/ios-deploy/ios-deploy.m
index 275283e..29c2c33 100644
--- a/src/ios-deploy/ios-deploy.m
+++ b/src/ios-deploy/ios-deploy.m
@@ -1350,7 +1350,7 @@
     check_error(AMDeviceValidatePairing(device));
     check_error(AMDeviceStartSession(device));
 
-    CFStringRef result = AMDeviceCopyValue(device, @"com.apple.mobile.battery", @"BatteryCurrentCapacity");
+    CFStringRef result = AMDeviceCopyValue(device, (void*)@"com.apple.mobile.battery", (__bridge CFStringRef)@"BatteryCurrentCapacity");
     NSLogOut(@"BatteryCurrentCapacity:%@",result);
     CFRelease(result);