diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/gui/editor/BauGuiImportExport.java b/BauSystem_Main/src/de/steamwar/bausystem/features/gui/editor/BauGuiImportExport.java
index d8aa5f5f..d299b0e4 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/gui/editor/BauGuiImportExport.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/gui/editor/BauGuiImportExport.java
@@ -36,19 +36,14 @@ public class BauGuiImportExport {
         append(st, Integer.toBinaryString(mapping.getSize() / 9), 3); // Menu Size
 
         Map<Integer, Integer> map = new HashMap<>();
-        mapping.getMapping().forEach((integer, integer2) -> {
-            map.put(integer2, integer);
-        });
+        mapping.getMapping().forEach((integer, integer2) -> map.put(integer2, integer));
 
         List<Integer> integerList = map.keySet().stream().sorted().collect(Collectors.toList());
         for (int i = 0; i < integerList.size(); i++) {
             int current = integerList.get(i);
-            int last = 0;
-            if (i != 0) {
-                last = integerList.get(i - 1);
-            }
+            int last = i == 0 ? 0 : integerList.get(i - 1);
             if (current - last > 1) {
-                binaryConvert(st, Integer.toBinaryString(current - last), 3, '0');
+                binaryConvert(st, Integer.toBinaryString(current - last - 1), 3, '0');
             }
             binaryConvert(st, Integer.toBinaryString(map.get(current)), 4, '1');
         }