From fb49e45402c0370c030ce3c128b08bccf960bf44 Mon Sep 17 00:00:00 2001
From: Hans Bolinder <hasse@erlang.org>
Date: Thu, 19 May 2016 08:59:45 +0200
Subject: stdlib: Correct types and specs

---
 lib/stdlib/src/sofs.erl | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/stdlib/src/sofs.erl')

diff --git a/lib/stdlib/src/sofs.erl b/lib/stdlib/src/sofs.erl
index b18df2ad09..c244e06ca4 100644
--- a/lib/stdlib/src/sofs.erl
+++ b/lib/stdlib/src/sofs.erl
@@ -621,6 +621,9 @@ canonical_relation(Sets) when ?IS_SET(Sets) ->
 %%% Functions on binary relations only.
 %%%
 
+-spec(rel2fam(BinRel) -> Family when
+      Family :: family(),
+      BinRel :: binary_relation()).
 rel2fam(R) ->
     relation_to_family(R).
 
-- 
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