diff --git a/library/pk_internal.h b/library/pk_internal.h
index f5924ad..a1a34ad 100644
--- a/library/pk_internal.h
+++ b/library/pk_internal.h
@@ -127,6 +127,13 @@
 
     return MBEDTLS_PK_IS_RFC8410_GROUP_ID(id);
 }
+
+int mbedtls_pk_ecc_set_group(mbedtls_pk_context *pk, mbedtls_ecp_group_id grp_id);
+int mbedtls_pk_ecc_set_key(mbedtls_pk_context *pk, unsigned char *key, size_t key_len);
+int mbedtls_pk_ecc_set_pubkey(mbedtls_pk_context *pk, const unsigned char *pub, size_t pub_len);
+int mbedtls_pk_ecc_set_pubkey_from_prv(mbedtls_pk_context *pk,
+                                       const unsigned char *prv, size_t prv_len,
+                                       int (*f_rng)(void *, unsigned char *, size_t), void *p_rng);
 #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
 
 /* Helper for (deterministic) ECDSA */