diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 000bfdb9cb63def62dda30cb9bdfd1d07415b6c5..16c72db1564d4a342efe84d957ce98efae62ff89 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -896,7 +896,7 @@
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
  */
-//#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
+#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
 
 /**
  * \def MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED
diff --git a/port/config/config_liteos_a.h b/port/config/config_liteos_a.h
index 930e74b05145f1f6dfcd5cf10138dd09d5fb2cc0..520b359aa7d2497041942191618559ea0760eeac 100755
--- a/port/config/config_liteos_a.h
+++ b/port/config/config_liteos_a.h
@@ -901,7 +901,7 @@
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
  */
-//#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
+#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
 
 /**
  * \def MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED