--- a/content/media/MediaStreamGraph.cpp
+++ b/content/media/MediaStreamGraph.cpp
@@ -338,17 +338,17 @@ MediaStreamGraphImpl::UpdateCurrentTime(
 
     mCurrentTimeStamp = now;
     STREAM_LOG(PR_LOG_DEBUG+1, ("Updating current time to %f (real %f, mStateComputedTime %f)",
                MediaTimeToSeconds(nextCurrentTime),
                (now - mInitialTimeStamp).ToSeconds(),
                MediaTimeToSeconds(mStateComputedTime)));
   } else {
     prevCurrentTime = mCurrentTime;
-    nextCurrentTime = mCurrentTime + MEDIA_GRAPH_TARGET_PERIOD_MS;
+    nextCurrentTime = mCurrentTime + MillisecondsToMediaTime(MEDIA_GRAPH_TARGET_PERIOD_MS);
     STREAM_LOG(PR_LOG_DEBUG+1, ("Updating offline current time to %f (mStateComputedTime %f)",
                MediaTimeToSeconds(nextCurrentTime),
                MediaTimeToSeconds(mStateComputedTime)));
   }
 
   if (mStateComputedTime < nextCurrentTime) {
     STREAM_LOG(PR_LOG_WARNING, ("Media graph global underrun detected"));
     nextCurrentTime = mStateComputedTime;