diff --git a/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowBuilder.java b/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowBuilder.kt
similarity index 100%
rename from compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowBuilder.java
rename to compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowBuilder.kt