diff --git a/code/qudio.py b/code/qudio.py
index 8dea5e6..512d00a 100644
--- a/code/qudio.py
+++ b/code/qudio.py
@@ -56,6 +56,7 @@ def prev_callback(channel):
     ## TODO implement seek
      
 def play_callback(channel):
+    global is_playing
     if is_playing:
         logging.info("PAUSE")
         socketIO.emit('pause')