diff --git a/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataHeaderFlags.kt b/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataHeaderFlags.kt
index 48a73156ce9..0c5ed97d454 100644
--- a/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataHeaderFlags.kt
+++ b/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataHeaderFlags.kt
@@ -9,5 +9,6 @@ package org.jetbrains.kotlin.library.metadata
  * Possible values for [KlibMetadataProtoBuf.Header] flags field.
  */
 object KlibMetadataHeaderFlags {
-    const val PRE_RELEASE = 0x1
+    // Note: previously the value of this flag was 0x1.
+    const val PRE_RELEASE = 0x2
 }