diff --git a/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.java b/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt
similarity index 100%
rename from compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.java
rename to compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt
diff --git a/compiler/serialization/src/org/jetbrains/kotlin/serialization/SerializerExtension.java b/compiler/serialization/src/org/jetbrains/kotlin/serialization/SerializerExtension.kt
similarity index 100%
rename from compiler/serialization/src/org/jetbrains/kotlin/serialization/SerializerExtension.java
rename to compiler/serialization/src/org/jetbrains/kotlin/serialization/SerializerExtension.kt
diff --git a/compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTable.java b/compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTable.kt
similarity index 100%
rename from compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTable.java
rename to compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTable.kt
diff --git a/compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTableImpl.java b/compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTableImpl.kt
similarity index 100%
rename from compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTableImpl.java
rename to compiler/serialization/src/org/jetbrains/kotlin/serialization/StringTableImpl.kt