diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfig.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfig.kt
index 7f538f7677c..b69c41a050e 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfig.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfig.kt
@@ -152,7 +152,7 @@ class KonanConfig(val project: Project, val configuration: CompilerConfiguration
     }
 
     val concurrentWeakSweep: Boolean
-        get() = configuration.get(BinaryOptions.concurrentWeakSweep) ?: false
+        get() = configuration.get(BinaryOptions.concurrentWeakSweep) ?: true
 
     val gcMutatorsCooperate: Boolean by lazy {
         val mutatorsCooperate = configuration.get(BinaryOptions.gcMutatorsCooperate)