diff --git a/scripts/blame.py b/scripts/blame.py
index 27386da86..ff7077e3e 100755
--- a/scripts/blame.py
+++ b/scripts/blame.py
@@ -56,6 +56,9 @@ def get_aider_commits():
 
 def process(fnames):
     aider_commits = get_aider_commits()
+    total_lines = 0
+    total_aider_lines = 0
+
     for fname in fnames:
         num_lines, num_aider_lines = get_lines_with_commit_hash(fname, aider_commits)
         total_lines += num_lines