diff --git a/serial/serialposix.py b/serial/serialposix.py
index dbc4c86..195ecd4 100644
--- a/serial/serialposix.py
+++ b/serial/serialposix.py
@@ -511,7 +511,7 @@
                 # this is for Python 2.x
                 # ignore BlockingIOErrors and EINTR. all errors are shown
                 # see also http://www.python.org/dev/peps/pep-3151/#select
-                if e[0] not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR)):
+                if e[0] not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR):
                     raise SerialException('read failed: {}'.format(e))
             if timeout.expired():
                 break
@@ -571,7 +571,7 @@
                 # this is for Python 2.x
                 # ignore BlockingIOErrors and EINTR. all errors are shown
                 # see also http://www.python.org/dev/peps/pep-3151/#select
-                if e[0] not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR)):
+                if e[0] not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR):
                     raise SerialException('write failed: {}'.format(e))
             if not timeout.is_non_blocking and timeout.expired():
                 raise writeTimeoutError