diff --git a/image/FrameAnimator.cpp b/image/FrameAnimator.cpp
index 6be73a52fcfe..bfcf16e81e13 100644
--- a/image/FrameAnimator.cpp
+++ b/image/FrameAnimator.cpp
@@ -213,7 +213,6 @@ FrameAnimator::AdvanceFrame(AnimationState& aState, TimeStamp aTime)
   // Bad data
   if (GetTimeoutForFrame(aState, nextFrameIndex) < 0) {
     ret.animationFinished = true;
-    ret.error = true;
   }
 
   if (nextFrameIndex == 0) {
@@ -229,7 +228,6 @@ FrameAnimator::AdvanceFrame(AnimationState& aState, TimeStamp aTime)
       aState.mCurrentAnimationFrameTime = GetCurrentImgFrameEndTime(aState);
       aState.mCurrentAnimationFrameIndex = nextFrameIndex;
 
-      ret.error = true;
       return ret;
     }
 
diff --git a/image/FrameAnimator.h b/image/FrameAnimator.h
index d259d76b1bea..a08482a0f42f 100644
--- a/image/FrameAnimator.h
+++ b/image/FrameAnimator.h
@@ -152,21 +152,15 @@ public:
     // Whether the animation has finished playing.
     bool animationFinished : 1;
 
-    // Whether an error has occurred when trying to advance a frame. Note that
-    // errors do not, on their own, end the animation.
-    bool error : 1;
-
     RefreshResult()
       : frameAdvanced(false)
       , animationFinished(false)
-      , error(false)
     { }
 
     void Accumulate(const RefreshResult& other)
     {
       frameAdvanced = frameAdvanced || other.frameAdvanced;
       animationFinished = animationFinished || other.animationFinished;
-      error = error || other.error;
       dirtyRect = dirtyRect.Union(other.dirtyRect);
     }
   };