diff --git a/ratio.ipkg b/ratio.ipkg
index 3f97be0..8258a02 100644
--- a/ratio.ipkg
+++ b/ratio.ipkg
@@ -8,4 +8,5 @@ license = "MIT"
 sourcedir = "src"
 readme = "README.md"
 
-modules = Data.Ratio
+modules = Data.Ratio,
+          Data.IntegralGCD