diff --git a/src/W800_SDK_v1.00.10/app/app_utils/app_utils.c b/src/W800_SDK_v1.00.10/app/app_utils/app_utils.c
index eb9b021..3cdd077 100644
--- a/src/W800_SDK_v1.00.10/app/app_utils/app_utils.c
+++ b/src/W800_SDK_v1.00.10/app/app_utils/app_utils.c
@@ -1,6 +1,7 @@
+#include <math.h>
 #include "app_utils.h"
 #include "app_log.h"
-#include "wm_crypto_hard.h""
+#include "wm_crypto_hard.h"
 
 static uint32_t _elapsed_ms = 0;