diff --git a/generator/src/main/java/io/github/lonamiwebs/overgram/parser/TLReader.java b/generator/src/main/java/io/github/lonamiwebs/overgram/parser/TLReader.java
index 734f169..483e6f2 100644
--- a/generator/src/main/java/io/github/lonamiwebs/overgram/parser/TLReader.java
+++ b/generator/src/main/java/io/github/lonamiwebs/overgram/parser/TLReader.java
@@ -14,11 +14,10 @@ public class TLReader {
 
     public static void readTlObjects(final Map<String, List<TLObject>> result, final File file) {
         for (final Map.Entry<String, List<String>> entry : readTl(file).entrySet()) {
-            final List<TLObject> objects = new ArrayList<>();
+            final List<TLObject> objects = result.computeIfAbsent(entry.getKey(), k -> new ArrayList<>());
             for (final String string : entry.getValue()) {
                 objects.add(TLObject.fromString(string));
             }
-            result.put(entry.getKey(), objects);
         }
     }