diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinVariant.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinVariant.kt
index 1de70b49cc1..22797b52dd4 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinVariant.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinVariant.kt
@@ -17,4 +17,8 @@ data class IdeaKotlinVariantImpl(
     internal val fragment: IdeaKotlinFragment,
     override val variantAttributes: Map<String, String>,
     override val compilationOutputs: IdeaKotlinCompilationOutput,
-) : IdeaKotlinVariant, IdeaKotlinFragment by fragment
+) : IdeaKotlinVariant, IdeaKotlinFragment by fragment {
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}