diff --git a/gitinspector/changes.py b/gitinspector/changes.py
index bc8ef39..1dedccc 100644
--- a/gitinspector/changes.py
+++ b/gitinspector/changes.py
@@ -208,8 +208,8 @@ class Changes:
 
 		self.commits = [item for sublist in self.commits for item in sublist]
 
-		if interval.has_interval() and len(commits) > 0:
-			interval.set_ref(commits[-1].sha)
+		if interval.has_interval() and len(self.commits) > 0:
+			interval.set_ref(self.commits[-1].sha)
 
 		if len(self.commits) > 0:
 			self.first_commit_date = datetime.date(int(self.commits[0].date[0:4]), int(self.commits[0].date[5:7]),