diff --git a/core/compiler.common/src/org/jetbrains/kotlin/name/ClassId.java b/core/compiler.common/src/org/jetbrains/kotlin/name/ClassId.kt
similarity index 100%
rename from core/compiler.common/src/org/jetbrains/kotlin/name/ClassId.java
rename to core/compiler.common/src/org/jetbrains/kotlin/name/ClassId.kt