diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 17149c5..e3bc776 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -756,15 +756,19 @@
     mbedtls_ecdh_context ecdh_ctx;              /*!<  ECDH key exchange       */
 #endif /* MBEDTLS_ECDH_C && !MBEDTLS_USE_PSA_CRYPTO */
 
-#if defined(PSA_WANT_ALG_ECDH) && \
+#if (defined(PSA_WANT_ALG_ECDH) || defined(PSA_WANT_ALG_FFDH)) && \
     (defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_SSL_PROTO_TLS1_3))
     psa_key_type_t ecdh_psa_type;
     size_t ecdh_bits;
     mbedtls_svc_key_id_t ecdh_psa_privkey;
     uint8_t ecdh_psa_privkey_is_external;
+#if defined(PSA_WANT_ALG_FFDH)
+    unsigned char ecdh_psa_peerkey[MBEDTLS_PSA_MAX_FFDH_PUBKEY_LENGTH];
+#else
     unsigned char ecdh_psa_peerkey[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
+#endif
     size_t ecdh_psa_peerkey_len;
-#endif /* PSA_WANT_ALG_ECDH &&
+#endif /* (PSA_WANT_ALG_ECDH || PSA_WANT_ALG_FFDH) &&
           (MBEDTLS_USE_PSA_CRYPTO || MBEDTLS_SSL_PROTO_TLS1_3) */
 
 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
@@ -2122,6 +2126,13 @@
     size_t *out_len);
 #endif /* PSA_WANT_ALG_ECDH */
 
+int mbedtls_ssl_tls13_generate_and_write_dhe_key_exchange(
+    mbedtls_ssl_context *ssl,
+    uint16_t named_group,
+    unsigned char *buf,
+    unsigned char *end,
+    size_t *out_len);
+
 #if defined(MBEDTLS_SSL_EARLY_DATA)
 int mbedtls_ssl_tls13_write_early_data_ext(mbedtls_ssl_context *ssl,
                                            unsigned char *buf,
@@ -2245,9 +2256,15 @@
             return 1;
         }
     }
-#else
-    ((void) named_group);
-#endif /* PSA_WANT_ALG_ECDH */
+#endif
+#if defined(PSA_WANT_ALG_FFDH)
+    if (mbedtls_ssl_tls13_named_group_is_dhe(named_group)) {
+        return 1;
+    }
+#endif
+#if !defined(PSA_WANT_ALG_ECDH) && !defined(PSA_WANT_ALG_FFDH)
+    (void) named_group;
+#endif
     return 0;
 }