diff --git a/BUILD.gn b/BUILD.gn
index 0d20cde515e9905a0a1af3199b8307f0153c0d37..159d6559ec01ffcff153d63962b57c850fc6f032 100755
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -136,6 +136,7 @@ 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",
       ]
     }