diff --git a/best-caf-kernel/best-caf-kernel.py b/best-caf-kernel/best-caf-kernel.py
index 06abdef..8fc2dc0 100644
--- a/best-caf-kernel/best-caf-kernel.py
+++ b/best-caf-kernel/best-caf-kernel.py
@@ -30,6 +30,9 @@ def run_subprocess(cmd):
 def get_tags(tag_name):
     cmd = "git tag -l %s" % tag_name
     comm = run_subprocess(cmd)
+    if not str(comm[0]):
+        return 0
+
     return comm[0].strip("\n").split("\n")