diff --git a/BUILD.gn b/BUILD.gn
index 9fbc9e0b694c6ce6f10a6cd43d49f212c1368684..832c8e36cc1c5493a436decf8b67cbb7f8205554 100755
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -130,6 +130,7 @@ if (defined(ohos_lite)) {
   ohos_shared_library("mbedtls_shared") {
     if (mbedtls_enable_ssl_srv == true) {
       defines = [
+        "MBEDTLS_KEY_EXCHANGE_PSK_ENABLED",
         "MBEDTLS_SSL_SRV_C",
       ]
     }