diff --git a/deletefb/quit_driver.py b/deletefb/quit_driver.py
index 18e6539..4826c15 100644
--- a/deletefb/quit_driver.py
+++ b/deletefb/quit_driver.py
@@ -1,6 +1,9 @@
 import os
 
 def quit_driver_and_reap_children(driver):
+    """
+    Reaps child processes by waiting until they exit.
+    """
     driver.quit()
     try:
         pid = True