diff --git a/src/Language/TypeScript/Syntax.hs b/src/Language/TypeScript/Syntax.hs
index 923c25a28..c3734f8d8 100644
--- a/src/Language/TypeScript/Syntax.hs
+++ b/src/Language/TypeScript/Syntax.hs
@@ -899,7 +899,6 @@ unary = symbol Unary >>= \ location ->
       makeTerm location . Expression.Complement <$> children ( symbol AnonTilde *> expression )
   <|> makeTerm location . Expression.Not <$> children ( symbol AnonBang *> expression )
   <|> makeTerm location . Expression.Not <$> children ( symbol AnonNot *> expression )
-  <|> makeTerm location <$> children (Expression.Call <$> (makeTerm <$> symbol AnonDefinedQuestion <*> (Syntax.Identifier <$> source)) <*> some expression <*> emptyTerm)
   <|> children ( symbol AnonPlus *> expression )
   <|> makeTerm location . Expression.Negate <$> children expression -- Unary minus (e.g. `-a`). HiddenUnaryMinus nodes are hidden, so we can't match on the symbol.