diff --git a/pomodoroprompt.py b/pomodoroprompt.py
index 7d2cead..f3a3e88 100644
--- a/pomodoroprompt.py
+++ b/pomodoroprompt.py
@@ -1,5 +1,6 @@
 import sys
 import csv
+import os
 # This is a local script are we supposed to indicate that?
 import prompt_window
 import time
@@ -53,21 +54,26 @@ def quit_prompt():
 def log_step(text, utc_start, end_section=False):
     """ Write detailed log of all events
     """
-    timelog_file = Path(timelog_path(ext='log', daily=True))
+    timelog_file = Path(prepare_file(utc_start, ext='log', daily=True))
     timelog_file.touch(exist_ok=True)
     with timelog_file.open('a') as timelog:
         timelog.write(text + '\n')
         if end_section:
             timelog.write('\n\n')
 
-
 def record_task(whatnext, whatdid, start, end=None):
     """ Record completed pomodoro to CSV
     """
     if end is None:
         end = datetime.now(pytz.utc)
-    with open(prepare_file(), 'a', newline='') as csvfile:
-        # TODO make first line started, recorded, description, intention
+
+    filepath = prepare_file(start)
+    if not os.path.isfile(filepath):
+        with open(filepath, 'w', newline='') as csvfile:
+            log = csv.writer(csvfile)
+            log.writewrow(['started', 'recorded', 'description', 'intention'])
+
+    with open(filepath, 'a', newline='') as csvfile:
         timewriter = csv.writer(csvfile)
         timewriter.writerow([start, end, whatdid, whatnext])
 
@@ -84,7 +90,7 @@ def countdown_to(until):
         print('\r', str_minutes(to_go), sep='', end='')
         time.sleep(1)
 
-def prepare_file(ext='csv', daily=False, utc_start):
+def prepare_file(utc_start, ext='csv', daily=False):
     # Ensure log directory exists.
     if not os.path.exists('log'):
         os.makedirs('log')
@@ -148,6 +154,5 @@ def main():
             record_task(whatnext, 'Incomplete, interrupted task:' + whatnext, start)
             log_step('Incomplete, interrupted task:' + whatnext, start, True)
 
-
 if __name__ == '__main__':
     main()