diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/Boxing.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/Boxing.kt
index 86f07eee711..1c8e8a56f93 100644
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/Boxing.kt
+++ b/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/Boxing.kt
@@ -6,124 +6,124 @@
 package kotlin.native.internal
 
 @GCUnsafeCall("getCachedBooleanBox")
-external fun getCachedBooleanBox(value: Boolean): Boolean?
+@PublishedApi internal external fun getCachedBooleanBox(value: Boolean): Boolean?
 
 @GCUnsafeCall("inBooleanBoxCache")
-external fun inBooleanBoxCache(value: Boolean): Boolean
+@PublishedApi internal external fun inBooleanBoxCache(value: Boolean): Boolean
 
 @GCUnsafeCall("getCachedByteBox")
-external fun getCachedByteBox(value: Byte): Byte?
+@PublishedApi internal external fun getCachedByteBox(value: Byte): Byte?
 
 @GCUnsafeCall("inByteBoxCache")
-external fun inByteBoxCache(value: Byte): Boolean
+@PublishedApi internal external fun inByteBoxCache(value: Byte): Boolean
 
 @GCUnsafeCall("getCachedCharBox")
-external fun getCachedCharBox(value: Char): Char?
+@PublishedApi internal external fun getCachedCharBox(value: Char): Char?
 
 @GCUnsafeCall("inCharBoxCache")
-external fun inCharBoxCache(value: Char): Boolean
+@PublishedApi internal external fun inCharBoxCache(value: Char): Boolean
 
 @GCUnsafeCall("getCachedShortBox")
-external fun getCachedShortBox(value: Short): Short?
+@PublishedApi internal external fun getCachedShortBox(value: Short): Short?
 
 @GCUnsafeCall("inShortBoxCache")
-external fun inShortBoxCache(value: Short): Boolean
+@PublishedApi internal external fun inShortBoxCache(value: Short): Boolean
 
 @GCUnsafeCall("getCachedIntBox")
-external fun getCachedIntBox(idx: Int): Int?
+@PublishedApi internal external fun getCachedIntBox(idx: Int): Int?
 
 @GCUnsafeCall("inIntBoxCache")
-external fun inIntBoxCache(value: Int): Boolean
+@PublishedApi internal external fun inIntBoxCache(value: Int): Boolean
 
 @GCUnsafeCall("getCachedLongBox")
-external fun getCachedLongBox(value: Long): Long?
+@PublishedApi internal external fun getCachedLongBox(value: Long): Long?
 
 @GCUnsafeCall("inLongBoxCache")
-external fun inLongBoxCache(value: Long): Boolean
+@PublishedApi internal external fun inLongBoxCache(value: Long): Boolean
 
 // TODO: functions below are used for ObjCExport and CAdapterGenerator, move and rename them correspondingly.
 
 @ExportForCppRuntime("Kotlin_boxBoolean")
-fun boxBoolean(value: Boolean): Boolean? = value
+@PublishedApi internal fun boxBoolean(value: Boolean): Boolean? = value
 
 @ExportForCppRuntime("Kotlin_boxChar")
-fun boxChar(value: Char): Char? = value
+@PublishedApi internal fun boxChar(value: Char): Char? = value
 
 @ExportForCppRuntime("Kotlin_boxByte")
-fun boxByte(value: Byte): Byte? = value
+@PublishedApi internal fun boxByte(value: Byte): Byte? = value
 
 @ExportForCppRuntime("Kotlin_boxShort")
-fun boxShort(value: Short): Short? = value
+@PublishedApi internal fun boxShort(value: Short): Short? = value
 
 @ExportForCppRuntime("Kotlin_boxInt")
-fun boxInt(value: Int): Int? = value
+@PublishedApi internal fun boxInt(value: Int): Int? = value
 
 @ExportForCppRuntime("Kotlin_boxLong")
-fun boxLong(value: Long): Long? = value
+@PublishedApi internal fun boxLong(value: Long): Long? = value
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_boxUByte")
-fun boxUByte(value: UByte): UByte? = value
+@PublishedApi internal fun boxUByte(value: UByte): UByte? = value
 
-@ExperimentalUnsignedTypes
+@ExperimentalUnsignedTypes 
 @ExportForCppRuntime("Kotlin_boxUShort")
-fun boxUShort(value: UShort): UShort? = value
+@PublishedApi internal fun boxUShort(value: UShort): UShort? = value
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_boxUInt")
-fun boxUInt(value: UInt): UInt? = value
+@PublishedApi internal fun boxUInt(value: UInt): UInt? = value
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_boxULong")
-fun boxULong(value: ULong): ULong? = value
+@PublishedApi internal fun boxULong(value: ULong): ULong? = value
 
 @ExportForCppRuntime("Kotlin_boxFloat")
-fun boxFloat(value: Float): Float? = value
+@PublishedApi internal fun boxFloat(value: Float): Float? = value
 
 @ExportForCppRuntime("Kotlin_boxDouble")
-fun boxDouble(value: Double): Double? = value
+@PublishedApi internal fun boxDouble(value: Double): Double? = value
 
 @ExportForCppRuntime("Kotlin_boxUnit")
-internal fun Kotlin_boxUnit(): Unit? = Unit
+@PublishedApi internal fun Kotlin_boxUnit(): Unit? = Unit
 
 // Unbox fuctions
 
 @ExportForCppRuntime("Kotlin_unboxBoolean")
-fun unboxBoolean(value: Boolean?): Boolean = value!!
+@PublishedApi internal fun unboxBoolean(value: Boolean?): Boolean = value!!
 
 @ExportForCppRuntime("Kotlin_unboxChar")
-fun unboxChar(value: Char?): Char = value!!
+@PublishedApi internal fun unboxChar(value: Char?): Char = value!!
 
 @ExportForCppRuntime("Kotlin_unboxByte")
-fun unboxByte(value: Byte?): Byte = value!!
+@PublishedApi internal fun unboxByte(value: Byte?): Byte = value!!
 
 @ExportForCppRuntime("Kotlin_unboxShort")
-fun unboxShort(value: Short?): Short = value!!
+@PublishedApi internal fun unboxShort(value: Short?): Short = value!!
 
 @ExportForCppRuntime("Kotlin_unboxInt")
-fun unboxInt(value: Int?): Int = value!!
+@PublishedApi internal fun unboxInt(value: Int?): Int = value!!
 
 @ExportForCppRuntime("Kotlin_unboxLong")
-fun unboxLong(value: Long?): Long = value!!
+@PublishedApi internal fun unboxLong(value: Long?): Long = value!!
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_unboxUByte")
-fun unboxUByte(value: UByte?): UByte = value!!
+@PublishedApi internal fun unboxUByte(value: UByte?): UByte = value!!
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_unboxUShort")
-fun unboxUShort(value: UShort?): UShort = value!!
+@PublishedApi internal fun unboxUShort(value: UShort?): UShort = value!!
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_unboxUInt")
-fun unboxUInt(value: UInt?): UInt = value!!
+@PublishedApi internal fun unboxUInt(value: UInt?): UInt = value!!
 
 @ExperimentalUnsignedTypes
 @ExportForCppRuntime("Kotlin_unboxULong")
-fun unboxULong(value: ULong?): ULong = value!!
+@PublishedApi internal fun unboxULong(value: ULong?): ULong = value!!
 
 @ExportForCppRuntime("Kotlin_unboxFloat")
-fun unboxFloat(value: Float?): Float = value!!
+@PublishedApi internal fun unboxFloat(value: Float?): Float = value!!
 
 @ExportForCppRuntime("Kotlin_unboxDouble")
-fun unboxDouble(value: Double?): Double = value!!
+@PublishedApi internal fun unboxDouble(value: Double?): Double = value!!
diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/InteropBoxing.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/InteropBoxing.kt
deleted file mode 100644
index ef1e414a466..00000000000
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/InteropBoxing.kt
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-
-package kotlin.native.internal
-
-import kotlinx.cinterop.*
-
-@Frozen
-@OptIn(FreezingIsDeprecated::class)
-class NativePtrBox(val value: NativePtr) {
-    override fun equals(other: Any?): Boolean {
-        if (other !is NativePtrBox) {
-            return false
-        }
-
-        return this.value == other.value
-    }
-
-    override fun hashCode() = value.hashCode()
-
-    override fun toString() = value.toString()
-}
-
-fun boxNativePtr(value: NativePtr) = NativePtrBox(value)
-
-@Frozen
-@OptIn(FreezingIsDeprecated::class)
-class NativePointedBox(val value: NativePointed) {
-    override fun equals(other: Any?): Boolean {
-        if (other !is NativePointedBox) {
-            return false
-        }
-
-        return this.value == other.value
-    }
-
-    // TODO: can't delegate the following methods to `this.value`
-    // because `NativePointed` doesn't provide them.
-
-    override fun hashCode() = this.value.rawPtr.hashCode()
-
-    override fun toString() = "NativePointed(raw=${this.value.rawPtr})"
-}
-
-fun boxNativePointed(value: NativePointed?) = if (value != null) NativePointedBox(value) else null
-fun unboxNativePointed(box: NativePointedBox?) = box?.value
-
-@Frozen
-@OptIn(FreezingIsDeprecated::class)
-class CPointerBox(val value: CPointer<CPointed>) : CValuesRef<CPointed>() {
-    override fun equals(other: Any?): Boolean {
-        if (other !is CPointerBox) {
-            return false
-        }
-
-        return this.value == other.value
-    }
-
-    override fun hashCode() = value.hashCode()
-
-    override fun toString() = value.toString()
-
-    override fun getPointer(scope: AutofreeScope) = value.getPointer(scope)
-}
-
-fun boxCPointer(value: CPointer<CPointed>?) = if (value != null) CPointerBox(value) else null
-fun unboxCPointer(box: CPointerBox?) = box?.value
\ No newline at end of file