diff --git a/PIL/ImageEnhance.py b/PIL/ImageEnhance.py
index 10433343e..f802dc1d3 100644
--- a/PIL/ImageEnhance.py
+++ b/PIL/ImageEnhance.py
@@ -6,7 +6,7 @@
 #
 # For a background, see "Image Processing By Interpolation and
 # Extrapolation", Paul Haeberli and Douglas Voorhies.  Available
-# at http://www.sgi.com/grafica/interp/index.html
+# at http://www.graficaobscura.com/interp/index.html
 #
 # History:
 # 1996-03-23 fl  Created