diff --git a/src/MDConcMarkingType.php b/src/MDConcMarkingType.php
index b229de5..b9455fa 100644
--- a/src/MDConcMarkingType.php
+++ b/src/MDConcMarkingType.php
@@ -145,6 +145,7 @@ final class MDConcMarkingType implements MDImporterConcordanceListInterface {
 
         # Scratchings
         "Beschriftung (geritzt)" => "scratch",
+        "Signatur (geritzt)" => "scratch",
         "kratzen, Filzstift" => "scratch",
         "gekratzt" => "scratch",
         "eingeritztes Kreuzchen" => "scratch",