diff --git a/doc/release-notes.md b/doc/release-notes.md
index a29094b51..90a1216f9 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -4,3 +4,8 @@ release-notes at release time)
 Notable changes
 ===============
 
+Build system changes
+--------------------
+
+- Cross-compilation support for Windows XP and Vista has been removed.
+  Cross-compiled Windows binaries now target a minimum of Windows 7.