diff --git a/image/Image.cpp b/image/Image.cpp
index 49252dae988e..a01f89a340f4 100644
--- a/image/Image.cpp
+++ b/image/Image.cpp
@@ -169,7 +169,7 @@ ImageResource::GetImageContainerImpl(LayerManager* aManager,
 }
 
 void
-ImageResource::UpdateImageContainer(const IntSize&)
+ImageResource::UpdateImageContainer()
 {
   MOZ_ASSERT(NS_IsMainThread());
 
diff --git a/image/Image.h b/image/Image.h
index 0a6461b1a474..55a9125e611a 100644
--- a/image/Image.h
+++ b/image/Image.h
@@ -349,7 +349,7 @@ protected:
                           const gfx::IntSize& aSize,
                           uint32_t aFlags);
 
-  void UpdateImageContainer(const gfx::IntSize& aSize);
+  void UpdateImageContainer();
 
   void ReleaseImageContainer();
 
diff --git a/image/RasterImage.cpp b/image/RasterImage.cpp
index 0cdca8f5d05e..f65ed4b1605b 100644
--- a/image/RasterImage.cpp
+++ b/image/RasterImage.cpp
@@ -1604,7 +1604,7 @@ RasterImage::NotifyProgress(Progress aProgress,
 
   if (!aInvalidRect.IsEmpty() && wasDefaultFlags) {
     // Update our image container since we're invalidating.
-    UpdateImageContainer(mSize);
+    UpdateImageContainer();
   }
 
   if (!(aDecoderFlags & DecoderFlags::FIRST_FRAME_ONLY)) {