diff --git a/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrPredicates.kt b/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrPredicates.kt
index 04a8bd636cc..a4b9f97fe60 100644
--- a/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrPredicates.kt
+++ b/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrPredicates.kt
@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.platform.isJs
+import org.jetbrains.kotlin.platform.isWasm
 import org.jetbrains.kotlin.platform.konan.isNative
 import org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationPluginContext
 import org.jetbrains.kotlinx.serialization.compiler.fir.SerializationPluginKey
@@ -186,7 +187,7 @@ fun IrClass.findSerializableSyntheticConstructor(): IrConstructorSymbol? {
 }
 
 internal fun IrClass.needSerializerFactory(compilerContext: SerializationPluginContext): Boolean {
-    if (!(compilerContext.platform?.isNative() == true || compilerContext.platform.isJs())) return false
+    if (!(compilerContext.platform?.isNative() == true || compilerContext.platform.isJs() || compilerContext.platform.isWasm())) return false
     val serializableClass = getSerializableClassDescriptorByCompanion(this) ?: return false
     if (serializableClass.isSerializableObject) return true
     if (serializableClass.isSerializableEnum()) return true
diff --git a/plugins/kotlinx-serialization/kotlinx-serialization.k1/src/org/jetbrains/kotlinx/serialization/compiler/resolve/KSerializationUtil.kt b/plugins/kotlinx-serialization/kotlinx-serialization.k1/src/org/jetbrains/kotlinx/serialization/compiler/resolve/KSerializationUtil.kt
index 5258390a2c2..b3f9c4c4fc7 100644
--- a/plugins/kotlinx-serialization/kotlinx-serialization.k1/src/org/jetbrains/kotlinx/serialization/compiler/resolve/KSerializationUtil.kt
+++ b/plugins/kotlinx-serialization/kotlinx-serialization.k1/src/org/jetbrains/kotlinx/serialization/compiler/resolve/KSerializationUtil.kt
@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.platform.isJs
+import org.jetbrains.kotlin.platform.isWasm
 import org.jetbrains.kotlin.platform.konan.isNative
 import org.jetbrains.kotlin.psi.KtAnnotationEntry
 import org.jetbrains.kotlin.resolve.descriptorUtil.annotationClass
@@ -267,7 +268,7 @@ fun getSerializableClassDescriptorByCompanion(thisDescriptor: ClassDescriptor):
 }
 
 fun ClassDescriptor.needSerializerFactory(): Boolean {
-    if (!(this.platform?.isNative() == true || this.platform.isJs())) return false
+    if (!(this.platform?.isNative() == true || this.platform.isJs() || this.platform.isWasm())) return false
     val serializableClass = getSerializableClassDescriptorByCompanion(this) ?: return false
     if (serializableClass.isSerializableObject) return true
     if (serializableClass.isSerializableEnum()) return true
diff --git a/plugins/kotlinx-serialization/kotlinx-serialization.k2/src/org/jetbrains/kotlinx/serialization/compiler/fir/SerializationFirResolveExtension.kt b/plugins/kotlinx-serialization/kotlinx-serialization.k2/src/org/jetbrains/kotlinx/serialization/compiler/fir/SerializationFirResolveExtension.kt
index 8afc3d91dc1..6c4ffb74226 100644
--- a/plugins/kotlinx-serialization/kotlinx-serialization.k2/src/org/jetbrains/kotlinx/serialization/compiler/fir/SerializationFirResolveExtension.kt
+++ b/plugins/kotlinx-serialization/kotlinx-serialization.k2/src/org/jetbrains/kotlinx/serialization/compiler/fir/SerializationFirResolveExtension.kt
@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.platform.isJs
+import org.jetbrains.kotlin.platform.isWasm
 import org.jetbrains.kotlin.platform.konan.isNative
 import org.jetbrains.kotlinx.serialization.compiler.resolve.SerialEntityNames
 import org.jetbrains.kotlinx.serialization.compiler.resolve.SerialEntityNames.SERIALIZER_FACTORY_INTERFACE_NAME
@@ -311,7 +312,7 @@ class SerializationFirResolveExtension(session: FirSession) : FirDeclarationGene
     context(FirSession)
     private val FirClassSymbol<*>.companionNeedsSerializerFactory: Boolean
         get() {
-            if (!(moduleData.platform.isNative() || moduleData.platform.isJs())) return false
+            if (!(moduleData.platform.isNative() || moduleData.platform.isJs() || moduleData.platform.isWasm())) return false
             if (isSerializableObject) return true
             if (isSerializableEnum) return true
             if (isAbstractOrSealedSerializableClass) return true