diff --git a/IDE/MDK5-ARM/Projects/CryptBenchmark/RTE/wolfSSL/user_settings.h b/IDE/MDK5-ARM/Projects/CryptBenchmark/RTE/wolfSSL/user_settings.h
index dbf6ad929..2449e40c7 100644
--- a/IDE/MDK5-ARM/Projects/CryptBenchmark/RTE/wolfSSL/user_settings.h
+++ b/IDE/MDK5-ARM/Projects/CryptBenchmark/RTE/wolfSSL/user_settings.h
@@ -34,10 +34,10 @@
 #define WOLFSSL_USER_CURRTIME /* for benchmark */
 #define WOLFSSL_CURRTIME_OSTICK /* use OS tich for current_time */
 #define WOLFSSL_GMTIME
+#define NO_MULTIBYTE
 
 // <<< Use Configuration Wizard in Context Menu >>>
 
-
 //  <h>Common options
 //        <o> MPU<0=>Undefined<1=>STM32F2xx<2=>STM32F4xx<3=>STM32F7xx
 #define MDK_CONF_MPU 3
diff --git a/IDE/MDK5-ARM/Projects/CryptTest/RTE/wolfSSL/user_settings.h b/IDE/MDK5-ARM/Projects/CryptTest/RTE/wolfSSL/user_settings.h
index a444230ef..588b10613 100644
--- a/IDE/MDK5-ARM/Projects/CryptTest/RTE/wolfSSL/user_settings.h
+++ b/IDE/MDK5-ARM/Projects/CryptTest/RTE/wolfSSL/user_settings.h
@@ -34,6 +34,7 @@
 #define WOLFSSL_USER_CURRTIME /* for benchmark */
 #define WOLFSSL_CURRTIME_OSTICK /* use OS tich for current_time */
 #define WOLFSSL_GMTIME
+#define NO_MULTIBYTE
 
 // <<< Use Configuration Wizard in Context Menu >>>