diff --git a/backup-diff.py b/backup-diff.py
index 5c6ffcf..76ddd81 100755
--- a/backup-diff.py
+++ b/backup-diff.py
@@ -83,7 +83,7 @@ class BackupDiff:
 	def consume_arguments(self):
 		
 		i = 0
-		while i < len(sys.argv):
+		while i + 1 < len(sys.argv):
 			
 			i += 1