diff --git a/lang/compile.py b/lang/compile.py
index 895700b..7aae44b 100755
--- a/lang/compile.py
+++ b/lang/compile.py
@@ -475,13 +475,14 @@
 		return 'IRJumpAlways(name=%s)' % (self.name)
 
 class IRMetadata():
-	def __init__(self, id, name, uses):
+	def __init__(self, id, name, uses, classes_):
 		self.id = id
 		self.name = name
 		self.uses = uses
+		self.classes_ = classes_
 
 	def __repr__(self):
-		return 'IRMetadata(id=%s, name=%s, uses=%s)' % (self.id, self.name, self.uses)
+		return 'IRMetadata(id=%s, name=%s, uses=%s, classes=%s)' % (self.id, self.name, self.uses, self.classes_)
 
 class IRClass():
 	def __init__(self, name, functions):
@@ -627,7 +628,7 @@
 	return IRFunction(public, class_, name, ast.args, ir)
 
 def generate_ir_metadata(ast):
-	return IRMetadata(ast.id, ast.name, ast.uses)
+	return IRMetadata(ast.id, ast.name, ast.uses, [])
 
 def generate_ir(ast):
 	ir = []
@@ -715,6 +716,21 @@
 	new_ir = update_classes(old_ir, mapped_classes)
 	return new_ir
 
+def update_metadata(old_ir):
+	ir = []
+	classes_ = []
+	old = None
+	for node in old_ir:
+		if isinstance(node, IRClass):
+			classes_.append(node)
+		if isinstance(node, IRMetadata):
+			old = node
+			continue
+		ir.append(node)
+	metadata = IRMetadata(old.id, old.name, old.uses, classes_)
+	ir.append(metadata)
+	return ir
+
 ## Register allocation
 
 # Register allocation here is very simple: Each variable gets one stack slot
@@ -1071,7 +1087,11 @@
 	if ir_class is None:
 		print("Failed to generate classes")
 		return None
-	ir_reg = registers_allocate(module_args, ir_class)
+	ir_meta = update_metadata(ir_class)
+	if ir_meta is None:
+		print("Failed to generate metadata")
+		return None
+	ir_reg = registers_allocate(module_args, ir_meta)
 	if ir_reg is None:
 		print("Failed to allocate registers")
 		return None