diff --git a/docs/installation.rst b/docs/installation.rst
index 181ea856e..0371e517b 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -394,11 +394,11 @@ These platforms are built and tested for every change.
 +----------------------------------+-------------------------------+-----------------------+
 | Ubuntu Linux 14.04 LTS           | 2.7, 3.4, 3.5, 3.6,           |x86-64                 |
 |                                  | pypy, pypy3                   |                       |
-|                                  |                               |                       |
+|                                  +-------------------------------+-----------------------+
 |                                  | 2.7                           |x86                    |
 +----------------------------------+-------------------------------+-----------------------+
 | Windows Server 2012 R2           | 2.7, 3.4                      |x86, x86-64            |
-|                                  |                               |                       |
+|                                  +-------------------------------+-----------------------+
 |                                  | pypy, 3.5/mingw               |x86                    |
 +----------------------------------+-------------------------------+-----------------------+