diff --git a/offline-minecraft-launcher.py b/offline-minecraft-launcher.py
index 11b1e52..0803682 100644
--- a/offline-minecraft-launcher.py
+++ b/offline-minecraft-launcher.py
@@ -121,7 +121,7 @@ def checkRules(ruleList):
 				if rule["os"]["name"] == "osx": rule["os"]["name"] = "macos"
 				if lv["osName"] != rule["os"]["name"]: continue
 			
-			if "arch" in list["os"]:
+			if "arch" in rule["os"]:
 				if lv["jvmArch"] != rule["os"]["arch"]: continue
 			
 			action = rule["action"]