diff --git a/src/Lean/Elab/StructInst.lean b/src/Lean/Elab/StructInst.lean
index 4bd8b71d52..220d7b8e91 100644
--- a/src/Lean/Elab/StructInst.lean
+++ b/src/Lean/Elab/StructInst.lean
@@ -9,6 +9,7 @@ import Lean.Parser.Term
 import Lean.Meta.Structure
 import Lean.Elab.App
 import Lean.Elab.Binders
+import Lean.PrettyPrinter
 
 namespace Lean.Elab.Term.StructInst
 
@@ -433,7 +434,7 @@ private def expandParentFields (s : Struct) : TermElabM Struct := do
     | { lhs := .fieldName ref fieldName :: _,    .. } =>
       addCompletionInfo <| CompletionInfo.fieldId ref fieldName (← getLCtx) s.structName
       match findField? env s.structName fieldName with
-      | none => throwErrorAt ref "'{fieldName}' is not a field of structure '{s.structName}'"
+      | none => throwErrorAt ref "'{fieldName}' is not a field of structure '{MessageData.ofConstName s.structName}'"
       | some baseStructName =>
         if baseStructName == s.structName then pure field
         else match getPathToBaseStructure? env baseStructName s.structName with