diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index 265d6d3..4cd0d0e 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -1505,4 +1505,42 @@
 }
 #endif /* MBEDTLS_ECDH_C */
 
+#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
+/* Check if we have any PSK to offer, returns 0 if PSK is available.
+ * Assign the psk and ticket if pointers are present.
+ */
+int mbedtls_ssl_get_psk_to_offer(
+        const mbedtls_ssl_context *ssl,
+        int *psk_type,
+        const unsigned char **psk, size_t *psk_len,
+        const unsigned char **psk_identity, size_t *psk_identity_len )
+{
+    int ptrs_present = 0;
+
+    if( psk != NULL && psk_len != NULL &&
+        psk_identity != NULL && psk_identity_len != NULL )
+    {
+        ptrs_present = 1;
+    }
+
+    /* Check if an external PSK has been configured. */
+    if( ssl->conf->psk != NULL )
+    {
+        if( ptrs_present )
+        {
+            *psk = ssl->conf->psk;
+            *psk_len = ssl->conf->psk_len;
+            *psk_identity = ssl->conf->psk_identity;
+            *psk_identity_len = ssl->conf->psk_identity_len;
+        }
+
+        if( psk_type != NULL )
+            *psk_type = MBEDTLS_SSL_TLS1_3_PSK_EXTERNAL;
+        return( 0 );
+    }
+
+    return( 1 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */
+
 #endif /* MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_PROTO_TLS1_3 */