diff --git a/core/descriptors/src/org/jetbrains/kotlin/types/CompositeTypeSubstitution.java b/core/descriptors/src/org/jetbrains/kotlin/types/DisjointKeysUnionTypeSubstitution.kt
similarity index 100%
rename from core/descriptors/src/org/jetbrains/kotlin/types/CompositeTypeSubstitution.java
rename to core/descriptors/src/org/jetbrains/kotlin/types/DisjointKeysUnionTypeSubstitution.kt