diff --git a/readme.md b/readme.md
index b6989b7..d58cd3c 100644
--- a/readme.md
+++ b/readme.md
@@ -183,7 +183,7 @@ def validateSender(self, region: str, sender: str):
 	# Check that config value exists
 	if not self.config["allowed_regions"]: return False
 	# Check that region is allowed
-	if not self.config["allowed_regions"][region]: return False
+	if not region in self.config["allowed_regions"]: return False
 	# All senders allowed for this region
 	if len(self.config["allowed_regions"][region]) == 0: return True
 	# Check that sender is allowed for region