From d8fc186214f28c757d9ff06578f6042497d8bba5 Mon Sep 17 00:00:00 2001
From: Ary Borenszweig <aborenszweig@manas.com.ar>
Date: Wed, 16 Oct 2013 15:00:28 -0300
Subject: Spec for atan2 should be atan2(Y, X), not atan2(X, Y)

---
 lib/stdlib/src/math.erl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'lib/stdlib')

diff --git a/lib/stdlib/src/math.erl b/lib/stdlib/src/math.erl
index c3fb684ec3..98a70b1644 100644
--- a/lib/stdlib/src/math.erl
+++ b/lib/stdlib/src/math.erl
@@ -51,9 +51,9 @@ asinh(_) ->
 atan(_) ->
     erlang:nif_error(undef).
 
--spec atan2(X, Y) -> float() when
-      X :: number(),
-      Y :: number().
+-spec atan2(Y, X) -> float() when
+      Y :: number(),
+      X :: number().
 atan2(_, _) ->
     erlang:nif_error(undef).
 
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