1 files changed, 3 insertions, 1 deletions
diff --git a/src/dotty/tools/dotc/core/Denotations.scala b/src/dotty/tools/dotc/core/Denotations.scala
index 045f74300..4ab911160 100644
--- a/src/dotty/tools/dotc/core/Denotations.scala
+++ b/src/dotty/tools/dotc/core/Denotations.scala
@@ -8,7 +8,7 @@ import Names.{Name, PreName}
 import Names.TypeName
 import Symbols.NoSymbol
 import Symbols._
-import Types._, Periods._, Flags._, Transformers._
+import Types._, Periods._, Flags._, Transformers._, Decorators._
 import printing.Texts._
 import printing.Printer
 import io.AbstractFile
@@ -85,6 +85,8 @@ object Denotations {
    */
   val NotAMethod: Signature = List(Names.EmptyTypeName)
 
+  val UnknownSignature: Signature = List(" ".toTypeName)
+
   /** A denotation is the result of resolving
    *  a name (either simple identifier or select) during a given period.
    *