diff --git a/library/pk.c b/library/pk.c
index 7a047df..47c19b2 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -196,6 +196,39 @@
 }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
+#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
+int mbedtls_pk_update_public_key_from_keypair(mbedtls_pk_context *pk,
+                                              mbedtls_ecp_keypair *ecp_keypair)
+{
+    int ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
+
+    if (pk == NULL) {
+        return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
+    }
+    /* The raw public key storing mechanism is only supported for EC keys so
+     * we fail silently for other ones. */
+    if ((pk->pk_info->type != MBEDTLS_PK_ECKEY) &&
+        (pk->pk_info->type != MBEDTLS_PK_ECKEY_DH) &&
+        (pk->pk_info->type != MBEDTLS_PK_ECDSA)) {
+        return 0;
+    }
+
+    ret = mbedtls_ecp_point_write_binary(&ecp_keypair->grp, &ecp_keypair->Q,
+                                         MBEDTLS_ECP_PF_UNCOMPRESSED,
+                                         &pk->pub_raw_len,
+                                         pk->pub_raw,
+                                         MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN);
+    if (ret != 0) {
+        return ret;
+    }
+
+    pk->ec_family = mbedtls_ecc_group_to_psa(ecp_keypair->grp.id,
+                                             &pk->ec_bits);
+
+    return 0;
+}
+#endif /* MBEDTLS_PK_USE_PSA_EC_PUB_KEY */
+
 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
 /*
  * Initialize an RSA-alt context