diff --git a/mcp/server.go b/mcp/server.go
index e0f691dc..a1ba2be9 100644
--- a/mcp/server.go
+++ b/mcp/server.go
@@ -540,7 +540,7 @@ func (ss *ServerSession) ID() string {
 
 // Ping pings the client.
 func (ss *ServerSession) Ping(ctx context.Context, params *PingParams) error {
-	_, err := handleSend[*emptyResult](ctx, ss, methodPing, params)
+	_, err := handleSend[*emptyResult](ctx, ss, methodPing, orZero[Params](params))
 	return err
 }