diff --git a/kotlin-native/Interop/Indexer/build.gradle b/kotlin-native/Interop/Indexer/build.gradle
index 97b112c3b9d..a9b94b00d74 100644
--- a/kotlin-native/Interop/Indexer/build.gradle
+++ b/kotlin-native/Interop/Indexer/build.gradle
@@ -143,8 +143,8 @@ kotlinNativeInterop {
 
 compileKotlin {
     kotlinOptions {
-//        allWarningsAsErrors=true
-	    freeCompilerArgs = ["-Xskip-prerelease-check"]
+        allWarningsAsErrors=true
+	kotlinOptions.freeCompilerArgs = ["-Xskip-prerelease-check"]
     }
 }
 
diff --git a/kotlin-native/Interop/Runtime/build.gradle b/kotlin-native/Interop/Runtime/build.gradle
index 06a0a6663a6..c90aa241156 100644
--- a/kotlin-native/Interop/Runtime/build.gradle
+++ b/kotlin-native/Interop/Runtime/build.gradle
@@ -77,7 +77,7 @@ compileKotlin {
     kotlinOptions {
         freeCompilerArgs = ['-Xuse-experimental=kotlin.ExperimentalUnsignedTypes', '-Xuse-experimental=kotlin.Experimental',
                             '-Xopt-in=kotlin.RequiresOptIn', "-XXLanguage:+InlineClasses", "-Xskip-prerelease-check"]
-//        allWarningsAsErrors=true
+        allWarningsAsErrors=true
     }
 }
 
diff --git a/kotlin-native/Interop/StubGenerator/build.gradle b/kotlin-native/Interop/StubGenerator/build.gradle
index 1dfc3680a27..d4b8b3e9d08 100644
--- a/kotlin-native/Interop/StubGenerator/build.gradle
+++ b/kotlin-native/Interop/StubGenerator/build.gradle
@@ -47,6 +47,6 @@ dependencies {
 compileKotlin {
     kotlinOptions {
         freeCompilerArgs = ['-Xopt-in=kotlin.ExperimentalUnsignedTypes', '-Xskip-metadata-version-check']
-//        allWarningsAsErrors=true
+        allWarningsAsErrors=true
     }
 }
diff --git a/kotlin-native/backend.native/build.gradle b/kotlin-native/backend.native/build.gradle
index 9b4ef1a25dd..be75830d275 100644
--- a/kotlin-native/backend.native/build.gradle
+++ b/kotlin-native/backend.native/build.gradle
@@ -56,7 +56,7 @@ compileCompilerKotlin {
     // but not for Kotlin.
     dependsOn('generateCompilerProto')
     kotlinOptions.jvmTarget = "1.8"
-//    kotlinOptions.allWarningsAsErrors=true
+    kotlinOptions.allWarningsAsErrors=true
     kotlinOptions.freeCompilerArgs += ['-Xopt-in=kotlin.RequiresOptIn', '-Xopt-in=org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI', '-Xskip-prerelease-check']
 }
 
@@ -323,4 +323,4 @@ publishing {
             from components.java
         }
     }
-}
+}
\ No newline at end of file