diff --git a/lang/compile.py b/lang/compile.py
index c085e2c..3944027 100755
--- a/lang/compile.py
+++ b/lang/compile.py
@@ -319,7 +319,7 @@
 		if value.name == "Self":
 			return [IRSelf()]
 		else:
-			return [IRLoad(value.name, None)]
+			return [IRLoad(value.name, -1)]
 	else:
 		print("Unknown value ast node: %s" % (node))
 		return None
@@ -354,7 +354,7 @@
 	if not sub_ir:
 		print("Unknown set ast node: %s" % (node))
 		return None
-	store = IRStore(ast.name, None)
+	store = IRStore(ast.name, -1)
 	return sub_ir + [store]
 
 def generate_ir_return(ast):
@@ -362,7 +362,7 @@
 	if not value_ir:
 		print("Unknown return ast node: %s" % (node))
 		return None
-	store_ret = IRStore("Return", None)
+	store_ret = IRStore("Return", -1)
 	ret = IRReturn()
 	return value_ir + [store_ret, ret]