diff --git a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt
index e8c33d904fe..f384d73ef5e 100644
--- a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt
+++ b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt
@@ -57,6 +57,7 @@ import org.jetbrains.kotlin.js.analyzer.JsAnalysisResult
 import org.jetbrains.kotlin.js.config.*
 import org.jetbrains.kotlin.konan.file.ZipFileSystemAccessor
 import org.jetbrains.kotlin.konan.file.ZipFileSystemCacheableAccessor
+import org.jetbrains.kotlin.library.impl.BuiltInsPlatform
 import org.jetbrains.kotlin.library.metadata.KlibMetadataVersion
 import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
 import org.jetbrains.kotlin.name.FqName
@@ -464,7 +465,8 @@ class K2JsIrCompiler : CLICompiler<K2JSCompilerArguments>() {
                 jsOutputName = arguments.irPerModuleOutputName,
                 icData = icData,
                 expectDescriptorToSymbol = expectDescriptorToSymbol,
-                moduleFragment = moduleFragment
+                moduleFragment = moduleFragment,
+                builtInsPlatform = if (arguments.wasm) BuiltInsPlatform.WASM else BuiltInsPlatform.JS
             ) { file ->
                 metadataSerializer.serializeScope(file, sourceModule.jsFrontEndResult.bindingContext, moduleFragment.descriptor)
             }
diff --git a/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt b/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt
index 43b58b44143..6011ab2f2ee 100644
--- a/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt
+++ b/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt
@@ -127,6 +127,7 @@ fun generateKLib(
     icData: List<KotlinFileSerializedData>,
     expectDescriptorToSymbol: MutableMap<DeclarationDescriptor, IrSymbol>,
     moduleFragment: IrModuleFragment,
+    builtInsPlatform: BuiltInsPlatform = BuiltInsPlatform.JS,
     serializeSingleFile: (KtSourceFile) -> ProtoBuf.PackageFragment
 ) {
     val files = (depsDescriptors.mainModule as MainModule.SourceFiles).files.map(::KtPsiSourceFile)
@@ -149,6 +150,7 @@ fun generateKLib(
         depsDescriptors.jsFrontEndResult.hasErrors,
         abiVersion,
         jsOutputName,
+        builtInsPlatform,
         serializeSingleFile
     )
 }
@@ -617,6 +619,7 @@ fun serializeModuleIntoKlib(
     containsErrorCode: Boolean = false,
     abiVersion: KotlinAbiVersion,
     jsOutputName: String?,
+    builtInsPlatform: BuiltInsPlatform = BuiltInsPlatform.JS,
     serializeSingleFile: (KtSourceFile) -> ProtoBuf.PackageFragment
 ) {
     assert(files.size == moduleFragment.files.size)
@@ -725,7 +728,7 @@ fun serializeModuleIntoKlib(
         perFile = perFile,
         output = klibPath,
         versions = versions,
-        builtInsPlatform = BuiltInsPlatform.JS
+        builtInsPlatform = builtInsPlatform
     )
 }
 
diff --git a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/KotlinLibraryWriterImpl.kt b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/KotlinLibraryWriterImpl.kt
index b6d3620dba8..288d5ae353f 100644
--- a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/KotlinLibraryWriterImpl.kt
+++ b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/KotlinLibraryWriterImpl.kt
@@ -177,7 +177,7 @@ class KotlinLibraryOnlyIrWriter(output: String, moduleName: String, versions: Ko
 }
 
 enum class BuiltInsPlatform {
-    JVM, JS, NATIVE, COMMON;
+    JVM, JS, NATIVE, WASM, COMMON;
 
     companion object {
         fun parseFromString(name: String): BuiltInsPlatform? = values().firstOrNull { it.name == name }