diff --git a/AdvancedInstall.md b/AdvancedInstall.md
index 6031f95..2a37627 100644
--- a/AdvancedInstall.md
+++ b/AdvancedInstall.md
@@ -131,7 +131,7 @@ things. The [//source/tahoe-lafs/deps/ <https://tahoe-lafs.org/source/tahoe-lafs
 historical ones, but there should never be a reason to use anything but the
 latest. The tahoe-deps bundle contains a README that has a version number.
 
-Besides tahoe-deps, you'll also need a C++ compiler and Python headers. These requirements can be satisfied on a Debian system with "`apt-get install build-essential python-dev`".
+Besides tahoe-deps, you'll also need a C++ compiler and Python headers. These requirements can be satisfied on a Debian system with "`apt-get install build-essential python-dev`". You might also need to "`apt-get install python-openssl`" due to #2005.
 
 <a name="point6"></a>
 ## Installing Outside The Source Tree