diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index e8acc23..6a2a18f 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -652,6 +652,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     mbedtls_svc_key_id_t psk_opaque;            /*!< Opaque PSK from the callback   */
+    uint8_t psk_opaque_is_internal;
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
     unsigned char *psk;                 /*!<  PSK from the callback         */
     size_t psk_len;                     /*!<  Length of PSK from callback   */