diff --git a/image/src/RasterImage.cpp b/image/src/RasterImage.cpp
index b3bdcf74a42e..7626fc4da3b7 100644
--- a/image/src/RasterImage.cpp
+++ b/image/src/RasterImage.cpp
@@ -1518,22 +1518,6 @@ RasterImage::EnsureFrame(uint32_t aFramenum, int32_t aX, int32_t aY,
                      aFrame);
 }
 
-void
-RasterImage::FrameUpdated(uint32_t aFrameNum, nsIntRect &aUpdatedRect)
-{
-  NS_ABORT_IF_FALSE(aFrameNum < mFrames.Length(), "Invalid frame index!");
-
-  imgFrame *frame = GetImgFrameNoDecode(aFrameNum);
-  NS_ABORT_IF_FALSE(frame, "Calling FrameUpdated on frame that doesn't exist!");
-
-  frame->ImageUpdated(aUpdatedRect);
-
-  if (aFrameNum == GetCurrentImgFrameIndex() &&
-      !IsInUpdateImageContainer()) {
-    mImageContainer = nullptr;
-  }
-}
-
 nsresult
 RasterImage::SetFrameAsNonPremult(uint32_t aFrameNum, bool aIsNonPremult)
 {
diff --git a/image/src/RasterImage.h b/image/src/RasterImage.h
index 256dd8a509a4..0d591c422889 100644
--- a/image/src/RasterImage.h
+++ b/image/src/RasterImage.h
@@ -222,8 +222,6 @@ public:
                        uint32_t* imageLength,
                        imgFrame** aFrame);
 
-  void FrameUpdated(uint32_t aFrameNum, nsIntRect& aUpdatedRect);
-
   /* notification that the entire image has been decoded */
   nsresult DecodingComplete();