diff --git a/app/controllers/nwbib/Application.java b/app/controllers/nwbib/Application.java
index 270909c..68910d1 100644
--- a/app/controllers/nwbib/Application.java
+++ b/app/controllers/nwbib/Application.java
@@ -351,7 +351,7 @@ public static Promise<Result> journals() {
 	}
 
 	private static String sortValue(Map<String, String> map, final String key) {
-		String value = map.get(key).replaceAll("^(Der|Die|Das|De)\\s", "");
+		String value = map.get(key).replaceAll("^(Der|Die|Das|De|Dä)\\s", "");
 		return Arrays.asList(value.split("\\s")).toString();
 	}