diff --git a/src/source/initializing.md b/src/source/initializing.md
index 138e86f..fd505cd 100644
--- a/src/source/initializing.md
+++ b/src/source/initializing.md
@@ -20,7 +20,7 @@
 
 *Note: The source download is approximately 6GB in size.
 You will need 25GB free to complete a single build, and
-up to 80GB (or more) for a full set of builds.*
+up to 90GB (or more) for a full set of builds.*
 
 For an overview of the entire code-review and code-update process, see [Life of a Patch](life-of-a-patch.html).