diff --git a/gf.cabal b/gf.cabal
index 20b45e513..35987a794 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -152,6 +152,7 @@ executable gf
     PGF.TypeCheck
     PGF.Binary
     PGF.Printer
+    PGF.Optimize
     GFC
     GFI