diff --git a/rpc/client_example_test.go b/rpc/client_example_test.go
index 044b57a9c439..8dbeaf7d4821 100644
--- a/rpc/client_example_test.go
+++ b/rpc/client_example_test.go
@@ -28,7 +28,7 @@ import (
 // In this example, our client wishes to track the latest 'block number'
 // known to the server. The server supports two methods:
 //
-// eth_getBlockByNumber("latest", {})
+// eth_getBlockByNumber("latest", false)
 //    returns the latest block object.
 //
 // eth_subscribe("newHeads")
@@ -40,7 +40,11 @@ type Block struct {
 
 func ExampleClientSubscription() {
 	// Connect the client.
-	client, _ := rpc.Dial("ws://127.0.0.1:8545")
+	client, err := rpc.Dial("ws://127.0.0.1:8545")
+	if err != nil {
+		fmt.Println("dial error:", err)
+		return
+	}
 	subch := make(chan Block)
 
 	// Ensure that subch receives the latest block.