diff --git a/Ostrom.md b/Ostrom.md
index fee14c3..ea95362 100644
--- a/Ostrom.md
+++ b/Ostrom.md
@@ -11,7 +11,7 @@ That "Accounting" project is an ambitious project, but with very high value. I (
 Some BitCoin users are offering a bounty for someone to make it possible to pay for Tahoe-LAFS storage service with BitCoin as of 2011-05-31, the bounty sums up to 220 BTC.
 
 
-Without implementing a full Accounting system, there are many very simple and easy "low hanging fruits" which would increase the ability of the user to visualize how the Tahoe-LAFS grid behaves. For example, we currently don't even display how much storage space each server is offering! (648) 
+Without implementing a full Accounting system, there are many very simple and easy "low hanging fruits" which would increase the ability of the user to visualize how the Tahoe-LAFS grid behaves. For example, we currently don't even display how much storage space each server is offering! (#648) 
 
 Following from that, users would probably benefit from visualizations of server performance and its historical uptime. See the [tickets tagged with "ostrom"](http://tahoe-lafs.org/trac/tahoe-lafs/query?status=!closed&keywords=~ostrom&order=priority) for other examples.