diff --git a/jackal b/jackal
new file mode 100755
index 0000000..1eb42b9
--- /dev/null
+++ b/jackal
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec python jackalc.py "$@"
diff --git a/nodes.py b/nodes.py
index edeed2f..af35ed2 100644
--- a/nodes.py
+++ b/nodes.py
@@ -7,8 +7,8 @@ class Node:
     pass
 
 class BinOpNode(Node):
-    def __init__(self, binop, s1, s2):
-        self.binop = binop
+    def __init__(self, op, s1, s2):
+        self.op = op
         self.s1 = s1
         self.s2 = s2
 
diff --git a/parserdef.py b/parserdef.py
index 98711ee..1f04edb 100644
--- a/parserdef.py
+++ b/parserdef.py
@@ -16,6 +16,7 @@ reserved = {
         'return':   'RETURN',
 
         # types
+        'void':     'VOID',
         'byte':     'BYTE',
         'short':    'SHORT',
         'int':      'INT',