diff --git a/src/Lean/Parser/Command.lean b/src/Lean/Parser/Command.lean
index f0fc15f1aa..f4094d06ff 100644
--- a/src/Lean/Parser/Command.lean
+++ b/src/Lean/Parser/Command.lean
@@ -81,7 +81,7 @@ def structExplicitBinder := leading_parser atomic (declModifiers true >> "(") >>
 def structImplicitBinder := leading_parser atomic (declModifiers true >> "{") >> many1 ident >> optional inferMod >> declSig >> "}"
 def structInstBinder     := leading_parser atomic (declModifiers true >> "[") >> many1 ident >> optional inferMod >> declSig >> "]"
 def structSimpleBinder   := leading_parser atomic (declModifiers true >> ident) >> optional inferMod >> optDeclSig >> optional (Term.binderTactic <|> Term.binderDefault)
-def structFields         := leading_parser manyIndent (ppLine >> checkColGe >>(structExplicitBinder <|> structImplicitBinder <|> structInstBinder <|> structSimpleBinder))
+def structFields         := leading_parser manyIndent (ppLine >> checkColGe >> ppGroup (structExplicitBinder <|> structImplicitBinder <|> structInstBinder <|> structSimpleBinder))
 def structCtor           := leading_parser atomic (declModifiers true >> ident >> optional inferMod >> " :: ")
 def structureTk          := leading_parser "structure "
 def classTk              := leading_parser "class "