diff --git a/models/common/address-national.json b/models/common/address-national.json
index 7f19e7af8fe1051ccdba9fd7b4f7ed0860b7372f..35261fcda3fae3ff501ef0407438046e37a443ae 100644
--- a/models/common/address-national.json
+++ b/models/common/address-national.json
@@ -32,7 +32,7 @@
       "type": "string",
       "description": "Hausnummerzusatz",
       "maxLength": 2,
-      "pattern": "^[\\p{L}0-9. ]*$"
+      "pattern": "^[A-Za-z0-9. ]*$"
     },
     "postalCode": {
       "type": "string",