diff --git a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
index 0d54db130e7..af2752a11f9 100644
--- a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
+++ b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
@@ -131,7 +131,7 @@ open class KonanCompileTask: KonanTargetableTask() {
         internal set
     @Optional @Input var apiVersion      : String? = null
         internal set
-    @Input var manifest              : String? = null
+    @Optional @Input var manifest        : String? = null
         internal set
 
     @Input var dumpParameters: Boolean = false