diff --git a/src/MDConcMarkingPosition.php b/src/MDConcMarkingPosition.php
index 10005ab..7699617 100644
--- a/src/MDConcMarkingPosition.php
+++ b/src/MDConcMarkingPosition.php
@@ -132,13 +132,14 @@ final class MDConcMarkingPosition implements MDImporterConcordanceListInterface
         "Keilrahmen, oberer Schenkel" => "edge",
 
         // Full Front
-        "Vorderseite" => "front_front",
         "Front" => "front_front",
         "Frontal" => "front_front",
         "Frontseite" => "front_front",
         "Frontalseite" => "front_front",
+        "Stirnseite" => "front_front",
         "Volle Vorderseite" => "front_front",
         "Volle Frontseite" => "front_front",
+        "Vorderseite" => "front_front",
         "Vorderseite / Stirn" => "front_front",
         "Vorn" => "front_front",
         "vorn" => "front_front",