diff --git a/include/mbedtls/ecdh.h b/include/mbedtls/ecdh.h
index 7f61c45..3948d7c 100644
--- a/include/mbedtls/ecdh.h
+++ b/include/mbedtls/ecdh.h
@@ -145,6 +145,15 @@
 mbedtls_ecdh_context;
 
 /**
+ * \brief          Check whether a given group can be used for ECDH.
+ *
+ * \param gid      The ECP group ID to check.
+ *
+ * \return         \c 1 if the group can be used, \c 0 otherwise
+ */
+int mbedtls_ecdh_can_do( mbedtls_ecp_group_id gid );
+
+/**
  * \brief           This function generates an ECDH keypair on an elliptic
  *                  curve.
  *