diff --git a/hid_darwin.go b/hid_darwin.go
index af81ed1..80eb4b8 100644
--- a/hid_darwin.go
+++ b/hid_darwin.go
@@ -410,4 +410,4 @@ func reportCallback(context unsafe.Pointer, result C.IOReturn, sender unsafe.Poi
 	case dev.readCh <- data:
 	default:
 	}
-}
+}
\ No newline at end of file
diff --git a/hid_darwin_go110.go b/hid_darwin_go110.go
index 8a0cda2..5d403c1 100644
--- a/hid_darwin_go110.go
+++ b/hid_darwin_go110.go
@@ -12,4 +12,4 @@ var nilCfStringRef C.CFStringRef= 0
 var nilCfTypeRef C.CFTypeRef = 0
 var nilCfSetRef C.CFSetRef = 0
 var nilIOHIDDeviceRef C.IOHIDDeviceRef = 0
-var nilCfDictionaryRef C.CFDictionaryRef = 0
+var nilCfDictionaryRef C.CFDictionaryRef = 0
\ No newline at end of file
diff --git a/hid_darwin_go19.go b/hid_darwin_go19.go
index 7d6c4ba..becffd6 100644
--- a/hid_darwin_go19.go
+++ b/hid_darwin_go19.go
@@ -12,4 +12,4 @@ var nilCfStringRef C.CFStringRef= nil
 var nilCfTypeRef C.CFTypeRef = nil
 var nilCfSetRef C.CFSetRef = nil
 var nilIOHIDDeviceRef C.IOHIDDeviceRef = nil
-var nilCfDictionaryRef C.CFDictionaryRef = nil
+var nilCfDictionaryRef C.CFDictionaryRef = nil
\ No newline at end of file
diff --git a/hid_windows.go b/hid_windows.go
index 591bf0a..913036f 100644
--- a/hid_windows.go
+++ b/hid_windows.go
@@ -191,7 +191,7 @@ func ByPath(devicePath string) (*DeviceInfo, error) {
 	}
 
 	var attrs C.HIDD_ATTRIBUTES
-	attrs.Size = C.DWORD(unsafe.Sizeof(attrs))
+	attrs.Size = C.ULONG(unsafe.Sizeof(attrs))
 	C.HidD_GetAttributes(dev.h(), &attrs)
 
 	devInfo.VendorID = uint16(attrs.VendorID)