diff --git a/formats/json/nativeMain/src/kotlinx/serialization/json/JsonSchemaCache.kt b/formats/json/nativeMain/src/kotlinx/serialization/json/JsonSchemaCache.kt
index 16e223a0b..520a3b6d9 100644
--- a/formats/json/nativeMain/src/kotlinx/serialization/json/JsonSchemaCache.kt
+++ b/formats/json/nativeMain/src/kotlinx/serialization/json/JsonSchemaCache.kt
@@ -7,6 +7,7 @@ package kotlinx.serialization.json
 import kotlinx.serialization.json.internal.*
 import kotlin.native.ref.*
 import kotlin.random.*
+import kotlin.native.concurrent.*
 
 /**
  * This maps emulate thread-locality of DescriptorSchemaCache for Native.