diff --git a/regression_tests/q3map2/disappearing_sliver/README.txt b/regression_tests/q3map2/disappearing_sliver/README.txt
index 5914cc3d..bcbe49e9 100644
--- a/regression_tests/q3map2/disappearing_sliver/README.txt
+++ b/regression_tests/q3map2/disappearing_sliver/README.txt
@@ -46,6 +46,8 @@ And we get rid of the recpirocal length ilength altogether.  Even the
 slightest math errors are magnified in successive calls to linear algebra
 functions.
 
+The change described above was commmitted to GtkRadiant trunk as revision r363.
+
 
 POSSIBLE SIDE EFFECTS:
 ======================