diff --git a/MANIFEST.in b/MANIFEST.in
index 4b1d3dc..87f4f63 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,3 +4,4 @@ recursive-include wildcard *.zcml
 recursive-include wildcard *.pt
 recursive-include docs *.rst
 recursive-include docs *.txt
+recursive-include docs *.GPL