diff --git a/perga.cabal b/perga.cabal
index e8e41a4..de684d6 100644
--- a/perga.cabal
+++ b/perga.cabal
@@ -18,7 +18,7 @@ category:           Math
 build-type:         Simple
 
 extra-doc-files:    CHANGELOG.md
-                  , README.md
+                  , README.org
 
 common warnings
     ghc-options: -Wall