diff --git a/fcm.go b/fcm.go
index 29ab4ab..1fefc92 100644
--- a/fcm.go
+++ b/fcm.go
@@ -111,7 +111,7 @@ func (c *Client) SendMessage(ctx context.Context, msg Message) (SendResponse, er
 	return c.doSendRequest(sendRequest, true)
 }
 
-func (c *Client) ValidateMessage(msg Message) (SendResponse, error) {
+func (c *Client) ValidateMessage(ctx context.Context, msg Message) (SendResponse, error) {
 	sendRequest := SendRequest{
 		ValidateOnly: true,
 		Message:      msg,