diff --git a/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api b/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
index dd7f889edf..01f236fef6 100644
--- a/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
+++ b/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
@@ -1259,8 +1259,6 @@ public final class kotlinx/coroutines/selects/SelectUnbiasedKt {
 
 public final class kotlinx/coroutines/selects/UnbiasedSelectBuilderImpl : kotlinx/coroutines/selects/SelectBuilder {
 	public fun <init> (Lkotlin/coroutines/Continuation;)V
-	public final fun getClauses ()Ljava/util/ArrayList;
-	public final fun getInstance ()Lkotlinx/coroutines/selects/SelectBuilderImpl;
 	public final fun handleBuilderException (Ljava/lang/Throwable;)V
 	public final fun initSelectResult ()Ljava/lang/Object;
 	public fun invoke (Lkotlinx/coroutines/selects/SelectClause0;Lkotlin/jvm/functions/Function1;)V
diff --git a/kotlinx-coroutines-core/common/src/selects/SelectUnbiased.kt b/kotlinx-coroutines-core/common/src/selects/SelectUnbiased.kt
index c33c5b1f2c..25172a2d05 100644
--- a/kotlinx-coroutines-core/common/src/selects/SelectUnbiased.kt
+++ b/kotlinx-coroutines-core/common/src/selects/SelectUnbiased.kt
@@ -30,10 +30,12 @@ public suspend inline fun <R> selectUnbiased(crossinline builder: SelectBuilder<
 
 
 @PublishedApi
-internal class UnbiasedSelectBuilderImpl<in R>(uCont: Continuation<R>) :
-    SelectBuilder<R> {
-    val instance = SelectBuilderImpl(uCont)
-    val clauses = arrayListOf<() -> Unit>()
+internal class UnbiasedSelectBuilderImpl<in R>(
+    uCont: Continuation<R>
+) : SelectBuilder<R> {
+
+    private val instance = SelectBuilderImpl(uCont)
+    private val clauses = arrayListOf<() -> Unit>()
 
     @PublishedApi
     internal fun handleBuilderException(e: Throwable): Unit = instance.handleBuilderException(e)