diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmSerializerExtension.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmSerializerExtension.kt
similarity index 100%
rename from compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmSerializerExtension.java
rename to compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmSerializerExtension.kt