diff --git a/adafruit_led_animation/group.py b/adafruit_led_animation/group.py
index ab16507..4dcd6a2 100644
--- a/adafruit_led_animation/group.py
+++ b/adafruit_led_animation/group.py
@@ -163,7 +163,7 @@ class AnimationGroup:
             else:
                 if item.animate(False):
                     ret = True
-                pos = pos + 1
+                pos += 1
         return ret
 
     @property