diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinProjectStructureMetadata.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinProjectStructureMetadata.kt
index 008530649fb..9cfa1d37ec9 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinProjectStructureMetadata.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinProjectStructureMetadata.kt
@@ -131,7 +131,7 @@ data class KotlinProjectStructureMetadata(
 
 internal fun buildKotlinProjectStructureMetadata(project: Project): KotlinProjectStructureMetadata? {
     val topLevelExtensionOrNull = project.topLevelExtensionOrNull
-    require(topLevelExtensionOrNull is KotlinMultiplatformExtension) { "this function only works with the stable plugin" }
+    require(topLevelExtensionOrNull !is KotlinPm20ProjectExtension) { "this function only works with the stable plugin" }
 
     val sourceSetsWithMetadataCompilations =
         project.multiplatformExtensionOrNull?.targets?.getByName(KotlinMultiplatformPlugin.METADATA_TARGET_NAME)?.compilations?.associate {