diff --git a/kotlin-native/performance/numerical/src/main/kotlin-native/launcher.kt b/kotlin-native/performance/numerical/src/main/kotlin-native/launcher.kt
index 031f2f41dd6..84c5c68dcda 100644
--- a/kotlin-native/performance/numerical/src/main/kotlin-native/launcher.kt
+++ b/kotlin-native/performance/numerical/src/main/kotlin-native/launcher.kt
@@ -22,6 +22,7 @@ fun konanBellardPi() {
 
 fun clangBellardPi() {
     for (n in 1 .. 1000 step 9) {
+        @OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
         val result = cinterop.pi_nth_digit(n)
         Blackhole.consume(result)
     }
diff --git a/kotlin-native/performance/objcinterop/src/main/kotlin-native/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt b/kotlin-native/performance/objcinterop/src/main/kotlin-native/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
index 2d7acc13b14..3c2551d3ae0 100644
--- a/kotlin-native/performance/objcinterop/src/main/kotlin-native/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
+++ b/kotlin-native/performance/objcinterop/src/main/kotlin-native/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
@@ -2,6 +2,7 @@
  * Copyright 2010-2019 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.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.complexNumbers
 import kotlinx.cinterop.*
diff --git a/kotlin-native/performance/objcinterop/src/main/kotlin/main.kt b/kotlin-native/performance/objcinterop/src/main/kotlin/main.kt
index 13df58c10f1..8b65f689c33 100644
--- a/kotlin-native/performance/objcinterop/src/main/kotlin/main.kt
+++ b/kotlin-native/performance/objcinterop/src/main/kotlin/main.kt
@@ -16,7 +16,10 @@ class ObjCInteropLauncher: Launcher() {
             "fft" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, { fft() })
     )
     override val extendedBenchmarksSet: MutableMap<String, AbstractBenchmarkEntry> = mutableMapOf(
-            "generateNumbersSequence" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, { generateNumbersSequence() }),
+            "generateNumbersSequence" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, {
+                @OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+                generateNumbersSequence()
+            }),
             "subComplex" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, { subComplex() }),
             "classInheritance" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, { classInheritance() }),
             "categoryMethods" to BenchmarkEntryWithInit.create(::ComplexNumbersBenchmark, { categoryMethods() }),
diff --git a/kotlin-native/performance/objcinterop/src/main/kotlin/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt b/kotlin-native/performance/objcinterop/src/main/kotlin/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
index 4421bba47f8..e8eb56c0dfe 100644
--- a/kotlin-native/performance/objcinterop/src/main/kotlin/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
+++ b/kotlin-native/performance/objcinterop/src/main/kotlin/org/jetbrains/objCinteropBenchmarks/complexNumbers.kt
@@ -10,6 +10,7 @@ const val benchmarkSize = 10000
 expect class ComplexNumber
 
 expect class ComplexNumbersBenchmark() {
+    @OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
     fun generateNumbersSequence(): List<ComplexNumber>
     fun sumComplex()
     fun subComplex()