diff --git a/collects/tests/mzscheme/benchmarks/shootout/spectralnorm.ss b/collects/tests/mzscheme/benchmarks/shootout/spectralnorm.ss
index 1eea79e1c3..40a714f69b 100644
--- a/collects/tests/mzscheme/benchmarks/shootout/spectralnorm.ss
+++ b/collects/tests/mzscheme/benchmarks/shootout/spectralnorm.ss
@@ -1,3 +1,8 @@
+;; The Great Computer Language Shootout
+;; http://shootout.alioth.debian.org/
+
+;; Translated directly from the C# version, which was:
+;;   contributed by Isaac Gouy
 
 (module spectralnorm mzscheme
   (require (lib "string.ss"))