diff --git a/src/bpe_sup.erl b/src/bpe_sup.erl
index 4839c81..6c14900 100644
--- a/src/bpe_sup.erl
+++ b/src/bpe_sup.erl
@@ -7,7 +7,7 @@
 -export([start_link/0]).
 -export([init/1]).
 
-opt()        -> [ set, named_table, { keypos, 1 }, public ].
+-opt()        -> [ set, named_table, { keypos, 1 }, public ].
 tables()     -> [ processes ].
 start_link() -> supervisor:start_link({local, ?MODULE}, ?MODULE, []).
 init([])     -> [ ets:new(T,opt()) || T <- tables() ],