diff --git a/demo/demo-async-client.c b/demo/demo-async-client.c
index 30d227d..0c7c6c4 100644
--- a/demo/demo-async-client.c
+++ b/demo/demo-async-client.c
@@ -126,7 +126,7 @@ main(int argc, char *argv[])
     rpc_client->async_arg = (void *)(long)transport;
 
     /* call the client-side funcion */
-    searpc_strlen(rpc_client, "hello searpc", strlen_callback, "user data");
+    searpc_strlen_async(rpc_client, "hello searpc", strlen_callback, "user data");
 
     /* call the transport to receive response */
     transport_read (transport);
diff --git a/lib/gencode.py b/lib/gencode.py
index 94dd355..b8ac124 100644
--- a/lib/gencode.py
+++ b/lib/gencode.py
@@ -339,7 +339,7 @@ def gen_dfun_macro_list():
 async_dfun_template = r"""
 #define SEARPC_CLIENT_ASYNC_DEFUN_${RET_TYPE}__${ARG_TYPES}(funcname, gtype)   \
 static int                                                                     \
-funcname (SearpcClient *client, ${args}                                 \
+funcname##_async (SearpcClient *client, ${args}                                 \
           AsyncCallback callback, void *user_data)                      \
 {                                                                       \
     char *fcall;                                                        \