diff --git a/tests/examples/c/schemaless.c b/tests/examples/c/schemaless.c
index 0546924c0f38fc1bdba9a1d3a1a0c6e9d87fef4e..0b46d2ff134689992d648065511dd5c21766759e 100644
--- a/tests/examples/c/schemaless.c
+++ b/tests/examples/c/schemaless.c
@@ -163,7 +163,8 @@ int main(int argc, char* argv[]) {
   }
 
   TAOS_RES*   result;
-  const char* host = "127.0.0.1";
+  //const char* host = "127.0.0.1";
+  const char* host = NULL;
   const char* user = "root";
   const char* passwd = "taosdata";