diff --git a/src/java/com/threerings/media/FrameInterval.java b/src/java/com/threerings/media/FrameInterval.java
index e5dc43f3a..f168c3960 100644
--- a/src/java/com/threerings/media/FrameInterval.java
+++ b/src/java/com/threerings/media/FrameInterval.java
@@ -41,6 +41,7 @@ public abstract class FrameInterval
                 _nextTime += _repeatDelay;
             } else {
                 _nextTime = -1;
+                cancel();
             }
             expired();
         }