1 files changed, 1 insertions, 1 deletions
diff --git a/src-3.0/PGF.hs b/src-3.0/PGF.hs
index 87f186573..a9ef0b721 100644
--- a/src-3.0/PGF.hs
+++ b/src-3.0/PGF.hs
@@ -29,7 +29,7 @@ module PGF(
 
            -- * Expressions
            -- ** Tree
-           Tree(..),
+           Tree(..), Literal(..),
            showTree, readTree,
            
            -- ** Expr