diff --git a/scripts/version_suffix.py b/scripts/version_suffix.py
index d648098..1b17d87 100644
--- a/scripts/version_suffix.py
+++ b/scripts/version_suffix.py
@@ -5,7 +5,7 @@
 import sys
 
 file_path = sys.argv[1]
-suffix = sys.argv[2].strip()
+suffix = len(sys.argv) >= 3 and sys.argv[2].strip() or ""
 
 with open(file_path) as f:
     lines = f.readlines()