From 3d468d764f9db27844b9a9575cf20b8ec797ce94 Mon Sep 17 00:00:00 2001
From: Tim Golden <mail@timgolden.me.uk>
Date: Sat, 24 Oct 2015 11:38:01 +0100
Subject: [PATCH] Fix incorrect variable name

---
 gpiozero/output_devices.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gpiozero/output_devices.py b/gpiozero/output_devices.py
index f5ca5ea..7a36033 100644
--- a/gpiozero/output_devices.py
+++ b/gpiozero/output_devices.py
@@ -368,7 +368,7 @@ class Motor(SourceMixin, CompositeDevice):
     Generic bi-directional motor.
     """
     def __init__(self, forward=None, backward=None):
-        if not all([forward, back]):
+        if not all([forward, backward]):
             raise OutputDeviceError('forward and back pins must be provided')
         super(Motor, self).__init__()
         self._forward = PWMOutputDevice(forward)