diff --git a/examples/src/bussiness.c b/examples/src/bussiness.c
index 46c99fe2699aff1a34ffdb1429d724480598eccd..e59a36a3fdcb28642e2daaf88f1a4da112cea8e9 100644
--- a/examples/src/bussiness.c
+++ b/examples/src/bussiness.c
@@ -115,7 +115,7 @@ void server_bussiness(char *out, const char *in, uint32_t size)
 // the business processsing of client
 int32_t client_bussiness(char *out, const char *in, uint32_t size, bool verify, uint32_t *msg_idx)
 {
-    if (verify == false) {
+    if (!verify) {
         for (uint32_t i = 0; i < (size - 1); ++i) {
             out[i] = bussiness_messages_low[(*msg_idx + i) % BUSSINESS_MESSAGE_SIZE];
         }
@@ -130,8 +130,7 @@ int32_t client_bussiness(char *out, const char *in, uint32_t size, bool verify,
     }
     out[size - 1] = '\0';
 
-    ++(*msg_idx);
-    *msg_idx = (*msg_idx) % BUSSINESS_MESSAGE_SIZE;
+    *msg_idx = (*msg_idx + 1) % BUSSINESS_MESSAGE_SIZE;
 
     return PROGRAM_OK;
 }