diff --git a/generators/builtins/primitives/NativePrimitivesGenerator.kt b/generators/builtins/primitives/NativePrimitivesGenerator.kt
index a7de18452fd..db0e82cbe26 100644
--- a/generators/builtins/primitives/NativePrimitivesGenerator.kt
+++ b/generators/builtins/primitives/NativePrimitivesGenerator.kt
@@ -16,10 +16,6 @@ class NativePrimitivesGenerator(writer: PrintWriter) : BasePrimitivesGenerator(w
         import("kotlin.native.internal.*")
     }
 
-    override fun ClassBuilder.modifyGeneratedClass(thisKind: PrimitiveType) {
-        this.isFinal = true
-    }
-
     override fun CompanionObjectBuilder.modifyGeneratedCompanionObject(thisKind: PrimitiveType) {
         if (thisKind !in PrimitiveType.floatingPoint) {
             annotations += "CanBePrecreated"
diff --git a/generators/builtins/primitives/builders.kt b/generators/builtins/primitives/builders.kt
index f9878f806ce..1620e0cfd2e 100644
--- a/generators/builtins/primitives/builders.kt
+++ b/generators/builtins/primitives/builders.kt
@@ -133,7 +133,6 @@ internal class FileBuilder(private val builtBy: String) : PrimitiveBuilder {
 }
 
 internal class ClassBuilder : AnnotatedAndDocumented(), PrimitiveBuilder {
-    var isFinal: Boolean = false
     var name: String = ""
     private var primaryConstructor: PrimaryConstructorBuilder = PrimaryConstructorBuilder()
     private var secondaryConstructor: SecondaryConstructorBuilder? = null
@@ -175,7 +174,6 @@ internal class ClassBuilder : AnnotatedAndDocumented(), PrimitiveBuilder {
             this.printDocumentationAndAnnotations()
 
             append("public ")
-            if (isFinal) append("final ")
             appendLine("class $name ${primaryConstructor.build()}: ${superTypes.joinToString()} {")
 
             secondaryConstructor?.let {
diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/Primitives.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/Primitives.kt
index d6db289fd46..3178b982ac2 100644
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/Primitives.kt
+++ b/kotlin-native/runtime/src/main/kotlin/kotlin/Primitives.kt
@@ -13,7 +13,7 @@ package kotlin
 import kotlin.native.internal.*
 
 /** Represents a 8-bit signed integer. */
-public final class Byte private constructor() : Number(), Comparable<Byte> {
+public class Byte private constructor() : Number(), Comparable<Byte> {
     @CanBePrecreated
     companion object {
         /**
@@ -446,7 +446,7 @@ public final class Byte private constructor() : Number(), Comparable<Byte> {
 }
 
 /** Represents a 16-bit signed integer. */
-public final class Short private constructor() : Number(), Comparable<Short> {
+public class Short private constructor() : Number(), Comparable<Short> {
     @CanBePrecreated
     companion object {
         /**
@@ -877,7 +877,7 @@ public final class Short private constructor() : Number(), Comparable<Short> {
 }
 
 /** Represents a 32-bit signed integer. */
-public final class Int private constructor() : Number(), Comparable<Int> {
+public class Int private constructor() : Number(), Comparable<Int> {
     @CanBePrecreated
     companion object {
         /**
@@ -1361,7 +1361,7 @@ public final class Int private constructor() : Number(), Comparable<Int> {
 }
 
 /** Represents a 64-bit signed integer. */
-public final class Long private constructor() : Number(), Comparable<Long> {
+public class Long private constructor() : Number(), Comparable<Long> {
     @CanBePrecreated
     companion object {
         /**
@@ -1848,7 +1848,7 @@ public final class Long private constructor() : Number(), Comparable<Long> {
 }
 
 /** Represents a single-precision 32-bit IEEE 754 floating point number. */
-public final class Float private constructor() : Number(), Comparable<Float> {
+public class Float private constructor() : Number(), Comparable<Float> {
     companion object {
         /**
          * A constant holding the smallest *positive* nonzero value of Float.
@@ -2259,7 +2259,7 @@ public final class Float private constructor() : Number(), Comparable<Float> {
 }
 
 /** Represents a double-precision 64-bit IEEE 754 floating point number. */
-public final class Double private constructor() : Number(), Comparable<Double> {
+public class Double private constructor() : Number(), Comparable<Double> {
     companion object {
         /**
          * A constant holding the smallest *positive* nonzero value of Double.