diff --git a/src/Lean/PrettyPrinter/Formatter.lean b/src/Lean/PrettyPrinter/Formatter.lean
index 63d7f66db3..56508c7337 100644
--- a/src/Lean/PrettyPrinter/Formatter.lean
+++ b/src/Lean/PrettyPrinter/Formatter.lean
@@ -159,7 +159,12 @@ constant mkAntiquot.formatter' (name : String) (kind : Option SyntaxNodeKind) (a
 constant interpretParserDescr' : ParserDescr → CoreM Formatter
 
 unsafe def formatterForKindUnsafe (k : SyntaxNodeKind) : Formatter := do
-  (← liftM $ runForNodeKind formatterAttribute k interpretParserDescr')
+  if k == `missing then
+    push "<missing>"
+    goLeft
+  else
+    let f ← runForNodeKind formatterAttribute k interpretParserDescr'
+    f
 
 @[implementedBy formatterForKindUnsafe]
 constant formatterForKind (k : SyntaxNodeKind) : Formatter
diff --git a/src/Lean/PrettyPrinter/Parenthesizer.lean b/src/Lean/PrettyPrinter/Parenthesizer.lean
index a47898ef0e..fb7615a4b6 100644
--- a/src/Lean/PrettyPrinter/Parenthesizer.lean
+++ b/src/Lean/PrettyPrinter/Parenthesizer.lean
@@ -269,7 +269,11 @@ constant mkAntiquot.parenthesizer' (name : String) (kind : Option SyntaxNodeKind
 constant interpretParserDescr' : ParserDescr → CoreM Parenthesizer
 
 unsafe def parenthesizerForKindUnsafe (k : SyntaxNodeKind) : Parenthesizer := do
-  (← liftM $ runForNodeKind parenthesizerAttribute k interpretParserDescr')
+  if k == `missing then
+    pure ()
+  else
+    let p ← runForNodeKind parenthesizerAttribute k interpretParserDescr'
+    p
 
 @[implementedBy parenthesizerForKindUnsafe]
 constant parenthesizerForKind (k : SyntaxNodeKind) : Parenthesizer