diff --git a/include/mbedtls/hkdf.h b/include/mbedtls/hkdf.h
index 40ee64e..ebf5e12 100644
--- a/include/mbedtls/hkdf.h
+++ b/include/mbedtls/hkdf.h
@@ -70,7 +70,7 @@
  *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
  *          MD layer.
  */
-int mbedtls_hkdf( const mbedtls_md_info_t *md, const unsigned char *salt,
+int mbedtls_hkdf( mbedtls_md_handle_t md, const unsigned char *salt,
                   size_t salt_len, const unsigned char *ikm, size_t ikm_len,
                   const unsigned char *info, size_t info_len,
                   unsigned char *okm, size_t okm_len );
@@ -99,7 +99,7 @@
  *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
  *          MD layer.
  */
-int mbedtls_hkdf_extract( const mbedtls_md_info_t *md,
+int mbedtls_hkdf_extract( mbedtls_md_handle_t md,
                           const unsigned char *salt, size_t salt_len,
                           const unsigned char *ikm, size_t ikm_len,
                           unsigned char *prk );
@@ -130,7 +130,7 @@
  *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
  *          MD layer.
  */
-int mbedtls_hkdf_expand( const mbedtls_md_info_t *md, const unsigned char *prk,
+int mbedtls_hkdf_expand( mbedtls_md_handle_t md, const unsigned char *prk,
                          size_t prk_len, const unsigned char *info,
                          size_t info_len, unsigned char *okm, size_t okm_len );