diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
index e4afd9eabf6..de428b07b82 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
@@ -32,11 +32,13 @@ import org.jetbrains.kotlin.descriptors.ClassDescriptor;
 import org.jetbrains.kotlin.descriptors.DescriptorUtilKt;
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor;
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation;
+import org.jetbrains.kotlin.load.kotlin.JvmMetadataVersion;
 import org.jetbrains.kotlin.load.kotlin.ModuleMappingUtilKt;
 import org.jetbrains.kotlin.load.kotlin.PackagePartClassUtils;
 import org.jetbrains.kotlin.metadata.ProtoBuf;
 import org.jetbrains.kotlin.metadata.jvm.JvmModuleProtoBuf;
 import org.jetbrains.kotlin.metadata.jvm.deserialization.ModuleMapping;
+import org.jetbrains.kotlin.metadata.jvm.deserialization.ModuleMappingKt;
 import org.jetbrains.kotlin.metadata.jvm.deserialization.PackageParts;
 import org.jetbrains.kotlin.name.ClassId;
 import org.jetbrains.kotlin.name.FqName;
@@ -124,7 +126,7 @@ public class ClassFileFactory implements OutputFileCollection {
         generators.put(outputFilePath, new OutAndSourceFileList(CollectionsKt.toList(packagePartSourceFiles)) {
             @Override
             public byte[] asBytes(ClassBuilderFactory factory) {
-                return ClassFileUtilsKt.serializeToByteArray(moduleProto);
+                return ModuleMappingKt.serializeToByteArray(moduleProto, JvmMetadataVersion.INSTANCE.toArray());
             }
 
             @Override
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/classFileUtils.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/classFileUtils.kt
index bf33b25e5d8..95314bfb374 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/classFileUtils.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/classFileUtils.kt
@@ -16,16 +16,12 @@
 
 package org.jetbrains.kotlin.codegen
 
-import com.intellij.util.io.DataOutputStream
 import org.jetbrains.kotlin.backend.common.output.OutputFile
 import org.jetbrains.kotlin.codegen.state.GenerationState
-import org.jetbrains.kotlin.load.kotlin.JvmMetadataVersion
 import org.jetbrains.kotlin.load.kotlin.loadModuleMapping
-import org.jetbrains.kotlin.metadata.jvm.JvmModuleProtoBuf
 import org.jetbrains.kotlin.metadata.jvm.deserialization.ModuleMapping
 import org.jetbrains.kotlin.metadata.jvm.deserialization.PackageParts
 import org.jetbrains.kotlin.resolve.jvm.JvmClassName
-import java.io.ByteArrayOutputStream
 
 fun ClassFileFactory.getClassFiles(): Iterable<OutputFile> {
     return asList().filterClassFiles()
@@ -57,16 +53,3 @@ private fun Iterable<PackageParts>.addCompiledParts(state: GenerationState): Lis
                 }
             }
 }
-
-fun JvmModuleProtoBuf.Module.serializeToByteArray(): ByteArray {
-    val moduleMapping = ByteArrayOutputStream(4096)
-    val out = DataOutputStream(moduleMapping)
-    val version = JvmMetadataVersion.INSTANCE.toArray()
-    out.writeInt(version.size)
-    for (number in version) {
-        out.writeInt(number)
-    }
-    writeTo(out)
-    out.flush()
-    return moduleMapping.toByteArray()
-}
diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/metadata/MetadataSerializer.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/metadata/MetadataSerializer.kt
index d7e880575b1..e276c902b32 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/metadata/MetadataSerializer.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/metadata/MetadataSerializer.kt
@@ -23,17 +23,18 @@ import org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.codegen.JvmCodegenUtil
-import org.jetbrains.kotlin.codegen.serializeToByteArray
 import org.jetbrains.kotlin.config.CommonConfigurationKeys
 import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
+import org.jetbrains.kotlin.load.kotlin.JvmMetadataVersion
 import org.jetbrains.kotlin.load.kotlin.PackagePartClassUtils
 import org.jetbrains.kotlin.metadata.ProtoBuf
 import org.jetbrains.kotlin.metadata.jvm.JvmModuleProtoBuf
 import org.jetbrains.kotlin.metadata.jvm.deserialization.PackageParts
+import org.jetbrains.kotlin.metadata.jvm.deserialization.serializeToByteArray
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -125,7 +126,7 @@ open class MetadataSerializer(private val dependOnOldBuiltIns: Boolean) {
             for (table in packageTable.values) {
                 table.addTo(this)
             }
-        }.build().serializeToByteArray()
+        }.build().serializeToByteArray(JvmMetadataVersion.INSTANCE.toArray()) // TODO: use another version here, not JVM
 
         kotlinModuleFile.parentFile.mkdirs()
         kotlinModuleFile.writeBytes(packageTableBytes)
diff --git a/core/metadata.jvm/src/org/jetbrains/kotlin/metadata/jvm/deserialization/ModuleMapping.kt b/core/metadata.jvm/src/org/jetbrains/kotlin/metadata/jvm/deserialization/ModuleMapping.kt
index f84b6bfd8aa..6cc9f145b7e 100644
--- a/core/metadata.jvm/src/org/jetbrains/kotlin/metadata/jvm/deserialization/ModuleMapping.kt
+++ b/core/metadata.jvm/src/org/jetbrains/kotlin/metadata/jvm/deserialization/ModuleMapping.kt
@@ -7,9 +7,7 @@ package org.jetbrains.kotlin.metadata.jvm.deserialization
 
 import org.jetbrains.kotlin.metadata.deserialization.NameResolverImpl
 import org.jetbrains.kotlin.metadata.jvm.JvmModuleProtoBuf
-import java.io.ByteArrayInputStream
-import java.io.DataInputStream
-import java.io.IOException
+import java.io.*
 
 class ModuleMapping private constructor(
     val packageFqName2Parts: Map<String, PackageParts>,
@@ -210,3 +208,15 @@ class PackageParts(val packageFqName: String) {
     override fun toString() =
             (parts + metadataParts).toString()
 }
+
+fun JvmModuleProtoBuf.Module.serializeToByteArray(versionArray: IntArray): ByteArray {
+    val moduleMapping = ByteArrayOutputStream(4096)
+    val out = DataOutputStream(moduleMapping)
+    out.writeInt(versionArray.size)
+    for (number in versionArray) {
+        out.writeInt(number)
+    }
+    writeTo(out)
+    out.flush()
+    return moduleMapping.toByteArray()
+}