diff --git a/crypto/engine/tb_ecdsa.c b/crypto/engine/tb_ecdsa.c
index 682ca15312ad59c0d3237bb3e761ad654b0c4610..5860fcac72074bd5fd29fd76e46119142ae224ca 100644
--- a/crypto/engine/tb_ecdsa.c
+++ b/crypto/engine/tb_ecdsa.c
@@ -69,7 +69,7 @@ void ENGINE_unregister_ECDSA(ENGINE *e)
 	engine_table_unregister(&ecdsa_table, e);
 	}
 
-static void engine_unregister_all_ECDSA()
+static void engine_unregister_all_ECDSA(void)
 	{
 	engine_table_cleanup(&ecdsa_table);
 	}