diff --git a/examples/logic/eval b/examples/logic/eval
index 8884a28..d682b25 100755
--- a/examples/logic/eval
+++ b/examples/logic/eval
@@ -26,7 +26,7 @@ def main():
 	content = _sys.stdin.read()
 	node = _json.loads(content)
 	value = evaluate(node)
-	_sys.stdout.write(str(value) + "\n")
+	_sys.stdout.write(_json.dumps(value) + "\n")
 	
 
 main()