diff --git a/Adafruit_Video_Looper/hello_video.py b/Adafruit_Video_Looper/hello_video.py
index 6e971f0..d2bc181 100644
--- a/Adafruit_Video_Looper/hello_video.py
+++ b/Adafruit_Video_Looper/hello_video.py
@@ -44,7 +44,7 @@ class HelloVideoPlayer:
         self._process.poll()
         return self._process.returncode is None
 
-    def stop(self, block_timeout_sec=None):
+    def stop(self, block_timeout_sec=0):
         """Stop the video player.  block_timeout_sec is how many seconds to
         block waiting for the player to stop before moving on.
         """
diff --git a/Adafruit_Video_Looper/omxplayer.py b/Adafruit_Video_Looper/omxplayer.py
index 99f0496..0a11ec8 100644
--- a/Adafruit_Video_Looper/omxplayer.py
+++ b/Adafruit_Video_Looper/omxplayer.py
@@ -51,7 +51,7 @@ class OMXPlayer:
         self._process.poll()
         return self._process.returncode is None
 
-    def stop(self, block_timeout_sec=None):
+    def stop(self, block_timeout_sec=0):
         """Stop the video player.  block_timeout_sec is how many seconds to
         block waiting for the player to stop before moving on.
         """