diff --git a/src/main/kotlin/me/shedaniel/architect/plugin/TransformExpect.kt b/src/main/kotlin/me/shedaniel/architect/plugin/TransformExpect.kt
index 67fc287..d3be483 100644
--- a/src/main/kotlin/me/shedaniel/architect/plugin/TransformExpect.kt
+++ b/src/main/kotlin/me/shedaniel/architect/plugin/TransformExpect.kt
@@ -62,7 +62,7 @@ fun transformExpectPlatform(): (ClassNode, (String, ByteArray) -> Unit) -> Class
                 )
 
                 method.instructions.addReturn(returnValue.first { it != '[' })
-                method.maxStack = max(1, index)
+                method.maxStack = -1
             }
         }
 
diff --git a/src/main/kotlin/me/shedaniel/architect/plugin/utils/Transform.kt b/src/main/kotlin/me/shedaniel/architect/plugin/utils/Transform.kt
index e7bbd93..776ae3d 100644
--- a/src/main/kotlin/me/shedaniel/architect/plugin/utils/Transform.kt
+++ b/src/main/kotlin/me/shedaniel/architect/plugin/utils/Transform.kt
@@ -26,7 +26,7 @@ object Transform {
             if ((reader.access and Opcodes.ACC_MODULE) == 0) {
                 val node = ClassNode(Opcodes.ASM8)
                 reader.accept(node, ClassReader.EXPAND_FRAMES)
-                val writer = ClassWriter(0)
+                val writer = ClassWriter(ClassWriter.COMPUTE_MAXS)
                 transform(node) { name, bytes ->
                     File(output.toFile().parentFile, "$name.class").also {
                         it.delete()
@@ -48,7 +48,7 @@ object Transform {
                             if ((reader.access and Opcodes.ACC_MODULE) == 0) {
                                 val node = ClassNode(Opcodes.ASM8)
                                 reader.accept(node, ClassReader.EXPAND_FRAMES)
-                                val writer = ClassWriter(0)
+                                val writer = ClassWriter(ClassWriter.COMPUTE_MAXS)
                                 transform(node) { name, bytes ->
                                     zipOutputStream.putNextEntry(ZipEntry(name))
                                     zipOutputStream.write(bytes)