diff --git a/classlib/src/main/java/org/teavm/classlib/java/lang/ClassGenerator.java b/classlib/src/main/java/org/teavm/classlib/java/lang/ClassGenerator.java
index 4631029d4..847827d71 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/lang/ClassGenerator.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/lang/ClassGenerator.java
@@ -89,6 +89,10 @@ public class ClassGenerator implements Generator, Injector, DependencyPlugin {
         Set<String> accessibleFields = reflection.getAccessibleFields(className);
 
         ClassReader cls = context.getClassSource().get(className);
+        if (cls == null) {
+            return;
+        }
+
         writer.appendClass(className).append(".$meta.fields").ws().append('=').ws().append('[').indent();
 
         generateCreateMembers(writer, cls.getFields(), field -> {
@@ -120,6 +124,10 @@ public class ClassGenerator implements Generator, Injector, DependencyPlugin {
         Set<MethodDescriptor> accessibleMethods = reflection.getAccessibleMethods(className);
 
         ClassReader cls = context.getClassSource().get(className);
+        if (cls == null) {
+            return;
+        }
+
         writer.appendClass(className).append(".$meta.methods").ws().append('=').ws().append('[').indent();
 
         generateCreateMembers(writer, cls.getMethods(), method -> {
@@ -160,7 +168,8 @@ public class ClassGenerator implements Generator, Injector, DependencyPlugin {
 
             appendProperty(writer, "name", true, () ->  writer.append('"')
                     .append(RenderingUtil.escapeString(member.getName())).append('"'));
-            appendProperty(writer, "modifiers", false, () -> writer.append(packModifiers(member.readModifiers())));
+            appendProperty(writer, "modifiers", false, () -> writer.append(
+                    ElementModifier.pack(member.readModifiers())));
             appendProperty(writer, "accessLevel", false, () -> writer.append(member.getLevel().ordinal()));
             renderer.render(member);
             writer.outdent().softNewLine().append("}");
@@ -323,18 +332,4 @@ public class ClassGenerator implements Generator, Injector, DependencyPlugin {
     private interface MemberRenderer<T extends MemberReader> {
         void render(T member) throws IOException;
     }
-
-    private int packModifiers(Set<ElementModifier> elementModifiers) {
-        ElementModifier[] knownModifiers = ElementModifier.values();
-        int value = 0;
-        int bit = 1;
-        for (int i = 0; i < knownModifiers.length; ++i) {
-            ElementModifier modifier = knownModifiers[i];
-            if (elementModifiers.contains(modifier)) {
-                value |= bit;
-            }
-            bit <<= 1;
-        }
-        return value;
-    }
 }
diff --git a/classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java b/classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java
index c56e30321..0a133b31a 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java
@@ -325,6 +325,12 @@ public class TClass<T> extends TObject implements TAnnotatedElement {
         }
     }
 
+    public int getModifiers() {
+        int flags = platformClass.getMetadata().getFlags();
+        int accessLevel = platformClass.getMetadata().getAccessLevel();
+        return Flags.getModifiers(flags, accessLevel);
+    }
+
     public boolean desiredAssertionStatus() {
         return true;
     }
diff --git a/core/src/main/java/org/teavm/ast/ClassNode.java b/core/src/main/java/org/teavm/ast/ClassNode.java
index 3bc4048e9..642f10a4e 100644
--- a/core/src/main/java/org/teavm/ast/ClassNode.java
+++ b/core/src/main/java/org/teavm/ast/ClassNode.java
@@ -19,12 +19,14 @@ import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Set;
+import org.teavm.model.AccessLevel;
 import org.teavm.model.ElementModifier;
 
 public class ClassNode {
     private String name;
     private String parentName;
     private Set<ElementModifier> modifiers = EnumSet.noneOf(ElementModifier.class);
+    private AccessLevel accessLevel = AccessLevel.PUBLIC;
     private List<FieldNode> fields = new ArrayList<>();
     private List<MethodNode> methods = new ArrayList<>();
     private List<String> interfaces = new ArrayList<>();
@@ -57,4 +59,12 @@ public class ClassNode {
     public Set<ElementModifier> getModifiers() {
         return modifiers;
     }
+
+    public AccessLevel getAccessLevel() {
+        return accessLevel;
+    }
+
+    public void setAccessLevel(AccessLevel accessLevel) {
+        this.accessLevel = accessLevel;
+    }
 }
diff --git a/core/src/main/java/org/teavm/ast/decompilation/Decompiler.java b/core/src/main/java/org/teavm/ast/decompilation/Decompiler.java
index acae70ed9..1c04baa8c 100644
--- a/core/src/main/java/org/teavm/ast/decompilation/Decompiler.java
+++ b/core/src/main/java/org/teavm/ast/decompilation/Decompiler.java
@@ -209,6 +209,7 @@ public class Decompiler {
         }
         clsNode.getInterfaces().addAll(cls.getInterfaces());
         clsNode.getModifiers().addAll(cls.getModifiers());
+        clsNode.setAccessLevel(cls.getLevel());
         return clsNode;
     }
 
diff --git a/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java b/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
index 632711a80..0988d622d 100644
--- a/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
+++ b/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
@@ -467,11 +467,10 @@ public class Renderer implements RenderingManager {
                     writer.appendClass(iface);
                 }
                 writer.append("],").ws();
-                int flags = 0;
-                if (cls.getModifiers().contains(ElementModifier.ENUM)) {
-                    flags |= 1;
-                }
-                writer.append(flags).append(',').ws();
+
+                writer.append(ElementModifier.pack(cls.getModifiers())).append(',').ws();
+                writer.append(cls.getAccessLevel().ordinal()).append(',').ws();
+
                 MethodReader clinit = classSource.get(cls.getName()).getMethod(
                         new MethodDescriptor("<clinit>", ValueType.VOID));
                 if (clinit != null) {
diff --git a/core/src/main/java/org/teavm/cache/AstIO.java b/core/src/main/java/org/teavm/cache/AstIO.java
index ec64750e2..54f6d58ed 100644
--- a/core/src/main/java/org/teavm/cache/AstIO.java
+++ b/core/src/main/java/org/teavm/cache/AstIO.java
@@ -92,7 +92,7 @@ public class AstIO {
     }
 
     public void write(DataOutput output, RegularMethodNode method) throws IOException {
-        output.writeInt(packModifiers(method.getModifiers()));
+        output.writeInt(ElementModifier.pack(method.getModifiers()));
         output.writeShort(method.getVariables().size());
         for (VariableNode var : method.getVariables()) {
             write(output, var);
@@ -136,7 +136,7 @@ public class AstIO {
     }
 
     public void writeAsync(DataOutput output, AsyncMethodNode method) throws IOException {
-        output.writeInt(packModifiers(method.getModifiers()));
+        output.writeInt(ElementModifier.pack(method.getModifiers()));
         output.writeShort(method.getVariables().size());
         for (VariableNode var : method.getVariables()) {
             write(output, var);
@@ -167,14 +167,6 @@ public class AstIO {
         return node;
     }
 
-    private int packModifiers(Set<ElementModifier> modifiers) {
-        int packed = 0;
-        for (ElementModifier modifier : modifiers) {
-            packed |= 1 << modifier.ordinal();
-        }
-        return packed;
-    }
-
     private Set<ElementModifier> unpackModifiers(int packed) {
         EnumSet<ElementModifier> modifiers = EnumSet.noneOf(ElementModifier.class);
         while (packed != 0) {
diff --git a/core/src/main/java/org/teavm/model/ElementModifier.java b/core/src/main/java/org/teavm/model/ElementModifier.java
index 5669a7143..341975532 100644
--- a/core/src/main/java/org/teavm/model/ElementModifier.java
+++ b/core/src/main/java/org/teavm/model/ElementModifier.java
@@ -15,6 +15,8 @@
  */
 package org.teavm.model;
 
+import java.util.Set;
+
 /**
  * Represents flags for classes and class members.
  * @see ElementHolder
@@ -37,5 +39,19 @@ public enum ElementModifier {
     SYNTHETIC,
     TRANSIENT,
     VARARGS,
-    VOLATILE
+    VOLATILE;
+
+    public static int pack(Set<ElementModifier> elementModifiers) {
+        ElementModifier[] knownModifiers = ElementModifier.values();
+        int value = 0;
+        int bit = 1;
+        for (int i = 0; i < knownModifiers.length; ++i) {
+            ElementModifier modifier = knownModifiers[i];
+            if (elementModifiers.contains(modifier)) {
+                value |= bit;
+            }
+            bit <<= 1;
+        }
+        return value;
+    }
 }
diff --git a/core/src/main/resources/org/teavm/backend/javascript/runtime.js b/core/src/main/resources/org/teavm/backend/javascript/runtime.js
index 470db3011..9c1c2e615 100644
--- a/core/src/main/resources/org/teavm/backend/javascript/runtime.js
+++ b/core/src/main/resources/org/teavm/backend/javascript/runtime.js
@@ -418,7 +418,7 @@ function $rt_putStderr(ch) {
     }
 }
 function $rt_metadata(data) {
-    for (var i = 0; i < data.length; i += 7) {
+    for (var i = 0; i < data.length; i += 8) {
         var cls = data[i];
         cls.$meta = {};
         var m = cls.$meta;
@@ -434,15 +434,19 @@ function $rt_metadata(data) {
             cls.prototype = {};
         }
         var flags = data[i + 4];
-        m.enum = (flags & 1) != 0;
+        m.enum = (flags & 16) != 0;
+        m.flags = flags;
         m.primitive = false;
         m.item = null;
         cls.prototype.constructor = cls;
         cls.classObject = null;
-        var clinit = data[i + 5];
+
+        m.accessLevel = data[i + 5];
+
+        var clinit = data[i + 6];
         cls.$clinit = clinit !== 0 ? clinit : function() {};
 
-        var virtualMethods = data[i + 6];
+        var virtualMethods = data[i + 7];
         for (var j = 0; j < virtualMethods.length; j += 2) {
             var name = virtualMethods[j];
             var func = virtualMethods[j + 1];
diff --git a/platform/src/main/java/org/teavm/platform/PlatformClassMetadata.java b/platform/src/main/java/org/teavm/platform/PlatformClassMetadata.java
index 247328d39..bbca2938d 100644
--- a/platform/src/main/java/org/teavm/platform/PlatformClassMetadata.java
+++ b/platform/src/main/java/org/teavm/platform/PlatformClassMetadata.java
@@ -39,4 +39,7 @@ public interface PlatformClassMetadata extends JSObject {
 
     @JSProperty
     int getFlags();
+
+    @JSProperty
+    int getAccessLevel();
 }
diff --git a/samples/kotlin/teavm-samples-kotlin.iml b/samples/kotlin/teavm-samples-kotlin.iml
index d6d03f110..1690c4c0e 100644
--- a/samples/kotlin/teavm-samples-kotlin.iml
+++ b/samples/kotlin/teavm-samples-kotlin.iml
@@ -10,6 +10,10 @@
           <root url="file://$MODULE_DIR$/target/generated/js" relative="/" />
           <root url="file://$MODULE_DIR$/src/main/webapp" relative="/" />
         </webroots>
+        <sourceRoots>
+          <root url="file://$MODULE_DIR$/src/main/kotlin" />
+          <root url="file://$MODULE_DIR$/src/main/resources" />
+        </sourceRoots>
       </configuration>
     </facet>
   </component>