diff --git a/examples/bluetooth/bluedroid/classic_bt/a2dp_source/main/main.c b/examples/bluetooth/bluedroid/classic_bt/a2dp_source/main/main.c
index 6cf00bc010..97d9943f58 100644
--- a/examples/bluetooth/bluedroid/classic_bt/a2dp_source/main/main.c
+++ b/examples/bluetooth/bluedroid/classic_bt/a2dp_source/main/main.c
@@ -355,7 +355,7 @@ static int32_t bt_app_a2d_data_cb(uint8_t *data, int32_t len)
         return 0;
     }
 
-    int *p_buf = (int *)data;
+    int16_t *p_buf = (int16_t *)data;
     for (int i = 0; i < (len >> 1); i++) {
         p_buf[i] = rand() % (1 << 16);
     }