diff --git a/drivers/net/wireless/zd1201.c b/drivers/net/wireless/zd1201.c
index d5c0c66..78baa0f 100644
--- a/drivers/net/wireless/zd1201.c
+++ b/drivers/net/wireless/zd1201.c
@@ -49,7 +49,7 @@
 static int zd1201_fw_upload(struct usb_device *dev, int apfw)
 {
 	const struct firmware *fw_entry;
-	char *data;
+	const char *data;
 	unsigned long len;
 	int err;
 	unsigned char ret;