diff --git a/docs/spec/manifest-v2-2.md b/docs/spec/manifest-v2-2.md
index 2319cf6d..689d9e83 100644
--- a/docs/spec/manifest-v2-2.md
+++ b/docs/spec/manifest-v2-2.md
@@ -98,6 +98,9 @@ image manifest based on the Content-Type returned in the HTTP response.
             The optional os.version field specifies the operating system version,
             for example `10.0.10586`.
 
+            Windows versions are ordered so that the first compatible image is
+            at the top of the list.
+
         - **`os.features`** *array*
 
             The optional os.features field specifies an array of strings,