diff --git a/src/MDConcCurrencies.php b/src/MDConcCurrencies.php
index 61575b3..1e2fb9c 100644
--- a/src/MDConcCurrencies.php
+++ b/src/MDConcCurrencies.php
@@ -45,6 +45,7 @@ final class MDConcCurrencies implements MDImporterConcordanceListInterface {
         "eu-EUR" => "eu-EUR",
         "€" => "eu-EUR",
         "Mark (DDR)" => "ddr-Mark",
+        "Mark (DDR" => "ddr-Mark",
         "DDRMk" => "ddr-Mark",
         "ddr-Mark" => "ddr-Mark",
         "Ukrainian hryvnia" => "ua-UAH",