diff --git a/cpp/src/sdk/examples/simple/main.cpp b/cpp/src/sdk/examples/simple/main.cpp
index 3a7880997d..499b8a9935 100644
--- a/cpp/src/sdk/examples/simple/main.cpp
+++ b/cpp/src/sdk/examples/simple/main.cpp
@@ -51,7 +51,7 @@ main(int argc, char *argv[]) {
     }
 
     ClientTest test;
-    test.Test("", port);
+    test.Test(address, port);
 
     printf("Client stop...\n");
     return 0;