diff --git a/pywafo/src/wafo/source/rind2007/build_all.py b/pywafo/src/wafo/source/rind2007/build_all.py
index 1f79b32..0b48754 100644
--- a/pywafo/src/wafo/source/rind2007/build_all.py
+++ b/pywafo/src/wafo/source/rind2007/build_all.py
@@ -1,5 +1,9 @@
 """
-Builds rindmod.pyd
+Builds rindmod.pyd
+
+See also
+http://www.scipy.org/Cookbook/CompilingExtensionsOnWindowsWithMinGW
+
 """
 import os