diff --git a/linux/hid.c b/linux/hid.c
index 56dac0fa..2c5cb9fa 100644
--- a/linux/hid.c
+++ b/linux/hid.c
@@ -582,7 +582,7 @@ void  HID_API_EXPORT hid_free_enumeration(struct hid_device_info *devs)
 	}
 }
 
-hid_device * hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
+hid_device * hid_open(unsigned short vendor_id, unsigned short product_id, wchar_t *serial_number)
 {
 	struct hid_device_info *devs, *cur_dev;
 	const char *path_to_open = NULL;