diff --git a/docs/source/index.rst b/docs/source/index.rst
index a8b765a..cfc4539 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -66,6 +66,8 @@ On Ubuntu 14.04 (Trusty):
   :linenos:
   :lines: 20-
 
+.. _system-requirements:
+
 System Requirements
 ===================
 
@@ -77,6 +79,12 @@ on systems that meet the following requirements:
 * Ubuntu 14.04 (Trusty)
 * gcc version 4.8.4
 
+Known Issues
+------------
+
+* 32-bit builds have libeigen alignment problems which cause crashes and/or
+  memory corruptions.
+
 How to cite us
 ==============