diff --git a/debian/changelog b/debian/changelog
index 7b59883bb3..d1c3344ffa 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,7 +4,8 @@ git-annex (0.05) unstable; urgency=low
     on every file being committed/locked.
     (This actually also works around a bug in ghc, that caused
     git-annex 0.04 pre-commit to sometimes corrupt filename being read
-    from git ls-files and fail.
+    from git ls-files and fail. 
+    See <http://hackage.haskell.org/trac/ghc/ticket/4493>
     The excessive number of calls made by pre-commit exposed the ghc bug.
     Thanks Josh Triplett for the debugging.)
   * Build with -O2.