diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 7b8ffff..9c6db19 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -596,6 +596,22 @@
 int mbedtls_ecp_check_privkey( const mbedtls_ecp_group *grp, const mbedtls_mpi *d );
 
 /**
+ * \brief           Generate a private key
+ *
+ * \param grp       ECP group
+ * \param d         Destination MPI (secret part)
+ * \param f_rng     RNG function
+ * \param p_rng     RNG parameter
+ *
+ * \return          0 if successful,
+ *                  or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code
+ */
+int mbedtls_ecp_gen_privkey( const mbedtls_ecp_group *grp,
+                     mbedtls_mpi *d,
+                     int (*f_rng)(void *, unsigned char *, size_t),
+                     void *p_rng );
+
+/**
  * \brief           Generate a keypair with configurable base point
  *
  * \param grp       ECP group