diff --git a/core/descriptors/src/org/jetbrains/kotlin/incremental/components/LookupTracker.kt b/core/descriptors/src/org/jetbrains/kotlin/incremental/components/LookupTracker.kt
index 5213d9cd623..9cbecaf88a8 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/incremental/components/LookupTracker.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/incremental/components/LookupTracker.kt
@@ -31,7 +31,7 @@ public interface LookupTracker {
     )
 
     companion object {
-        val DO_NOTHING = object : LookupTracker {
+        val DO_NOTHING: LookupTracker = object : LookupTracker {
             override fun record(
                     lookupContainingFile: String,
                     lookupLine: Int?,