diff --git a/logbatcher/util.py b/logbatcher/util.py
index 36337ed..0d0945f 100644
--- a/logbatcher/util.py
+++ b/logbatcher/util.py
@@ -97,6 +97,9 @@ def log_to_dataframe(log_file, regex, headers, size):
         with open(log_file, 'r') as file:
             for line in [next(file) for _ in range(size)]:
                 try:
+                    if not headers:  # If no headers are defined
+                        log_contents.append(line.strip())
+                        continue
                     match = regex.search(line.strip())
                     message = [match.group(header) for header in headers]
                     log_contents.append(message[-1])
@@ -139,4 +142,4 @@ def verify_template(template):
         writer = csv.writer(csvfile)
         writer.writerow(["Dataset", "Value1", "Value2", "Value3"])  # 写入标题
         for row in data:
-            writer.writerow([row[0], row[1], row[2], row[3]])  # 写入数据
\ No newline at end of file
+            writer.writerow([row[0], row[1], row[2], row[3]])  # 写入数据