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-rw-r--r--src/GF/Source/GrammarToSource.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/GF/Source/GrammarToSource.hs b/src/GF/Source/GrammarToSource.hs
index 135fc96c2..b313b563c 100644
--- a/src/GF/Source/GrammarToSource.hs
+++ b/src/GF/Source/GrammarToSource.hs
@@ -31,7 +31,7 @@ trModule (i,mo) = case mo of
(mkTopDefs (concatMap trAnyDef (tree2list (jments m)) ++ map trFlag (flags m)))
trExtend :: Maybe Ident -> P.Extend
-trExtend i = maybe P.NoExt (P.Ext . tri) i
+trExtend i = maybe P.NoExt (P.Ext . singleton . tri) i
---- this has to be completed with other mtys
forName (MTConcrete a) = tri a