diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/VisitedSupertype.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/VisitedSupertype.kt
index 1a70d5bc63d..9a9a64c54ba 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/VisitedSupertype.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/VisitedSupertype.kt
@@ -5,6 +5,10 @@
 
 package org.jetbrains.kotlin.fir
 
+// This annotation is used in FIR interface super-type list
+// It *should* be used if super-type list includes more than one FIR element
+// It marks the single super-type to which visitor should proceed by default
+
 @Retention(AnnotationRetention.SOURCE)
 @Target(AnnotationTarget.TYPE)
 annotation class VisitedSupertype
\ No newline at end of file