diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/IrGenerator.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/IrGenerator.kt
index c1daa7473c7..290fb6f75b8 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/IrGenerator.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/IrGenerator.kt
@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.ir.builders
 
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 
 interface IrGenerator {
@@ -32,6 +33,7 @@ interface IrGeneratorContextInterface {
 }
 
 interface IrGeneratorContext : IrGeneratorContextInterface {
+    @ObsoleteDescriptorBasedAPI
     val builtIns: KotlinBuiltIns get() = irBuiltIns.builtIns
 }