diff --git a/generator/src/main/java/io/github/lonamiwebs/overgram/Overgram.java b/generator/src/main/java/io/github/lonamiwebs/overgram/Overgram.java
index 593664b..dfb470a 100644
--- a/generator/src/main/java/io/github/lonamiwebs/overgram/Overgram.java
+++ b/generator/src/main/java/io/github/lonamiwebs/overgram/Overgram.java
@@ -12,13 +12,15 @@ import java.util.Map;
 
 public class Overgram {
     public static void main(final String... args) throws IOException {
+        int layer = 0;
         final Map<String, List<TLObject>> objects = new HashMap<>();
         for (int i = 1; i < args.length; ++i) {
-            TLReader.readTlObjects(objects, new File(args[i]));
+            layer = Math.max(layer, TLReader.readTlObjects(objects, new File(args[i])));
         }
 
         final File parent = new File(args[0]);
         Generator.generateJava(
+                layer,
                 objects.get("types"),
                 objects.get("functions"),
                 new File(parent, "Abstract.java"),
diff --git a/generator/src/main/java/io/github/lonamiwebs/overgram/generator/Generator.java b/generator/src/main/java/io/github/lonamiwebs/overgram/generator/Generator.java
index 3ed08f1..c6b1f6d 100644
--- a/generator/src/main/java/io/github/lonamiwebs/overgram/generator/Generator.java
+++ b/generator/src/main/java/io/github/lonamiwebs/overgram/generator/Generator.java
@@ -12,11 +12,11 @@ public class Generator {
     private static final String VARIABLE_SUFFIX = "$";
 
     public static void generateJava(
-            final List<TLObject> types, final List<TLObject> functions,
+            final int layer, final List<TLObject> types, final List<TLObject> functions,
             final File abstractsFile, final File typesFile, final File functionsFile) throws IOException {
         makeParents(abstractsFile, typesFile, functionsFile);
         try (final Writer writer = new BufferedWriter(new FileWriter(abstractsFile))) {
-            writeAbstract(writer, types);
+            writeAbstract(writer, layer, types);
         }
         try (final Writer writer = new BufferedWriter(new FileWriter(typesFile))) {
             writeCode(writer, "Types", "%s", types, false);
@@ -26,10 +26,11 @@ public class Generator {
         }
     }
 
-    private static void writeAbstract(final Writer writer, final List<TLObject> objects) throws IOException {
+    private static void writeAbstract(final Writer writer, final int layer, final List<TLObject> objects) throws IOException {
         writer.write("package io.github.lonamiwebs.overgram.tl;\n");
         writer.write("@SuppressWarnings(\"unused\")\n");
         writer.write("public class Abstract {\n");
+        writer.write("public static final int LAYER = " + layer + ";\n");
         for (final Map.Entry<String, List<String>> nsNames : stringsByNamespace(uniqueTypes(objects)).entrySet()) {
             if (!nsNames.getKey().isEmpty()) {
                 writer.write("public static class ");
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 483e6f2..1524cbd 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
@@ -12,16 +12,43 @@ import java.util.Map;
 
 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()) {
+    public static int readTlObjects(final Map<String, List<TLObject>> result, final File file) {
+        final int[] layer = new int[1];
+        for (final Map.Entry<String, List<String>> entry : readTl(file, layer).entrySet()) {
             final List<TLObject> objects = result.computeIfAbsent(entry.getKey(), k -> new ArrayList<>());
             for (final String string : entry.getValue()) {
                 objects.add(TLObject.fromString(string));
             }
         }
+        return layer[0];
     }
 
-    private static Map<String, List<String>> readTl(final File file) {
+    private static void scanCommentForLayer(final CharacterIterator iter, final int[] layer) {
+        final String target = "/ LAYER ";
+        int i = 0;
+        char c = '\0';
+        while (iter.hasNext() && (c = iter.next()) != '\n') {
+            if (c != target.charAt(i)) {
+                break;
+            }
+
+            ++i;
+            if (i == target.length()) {
+                final StringBuilder builder = new StringBuilder();
+                while (iter.hasNext() && Character.isDigit(c = iter.next())) {
+                    builder.append(c);
+                }
+                layer[0] = Integer.parseInt(builder.toString());
+                break;
+            }
+        }
+
+        while (iter.hasNext() && c != '\n') {
+            c = iter.next();
+        }
+    }
+
+    private static Map<String, List<String>> readTl(final File file, final int[] layer) {
         final Map<String, List<String>> result = new HashMap<>();
 
         String section = "types";
@@ -32,9 +59,7 @@ public class TLReader {
                 switch (c) {
                     // Assume '/' only occurs in "// comments...\n"
                     case '/':
-                        do {
-                            c = iter.next();
-                        } while (iter.hasNext() && c != '\n');
+                        scanCommentForLayer(iter, layer);
                         break;
 
                     // Assume '-' only occurs in "---sections---\n"