--- a/layout/style/ServoBindings.cpp
+++ b/layout/style/ServoBindings.cpp
@@ -938,18 +938,17 @@ Gecko_CopyImageValueFrom(nsStyleImage* a
 
   *aImage = *aOther;
 }
 
 void
 Gecko_InitializeImageCropRect(nsStyleImage* aImage)
 {
   MOZ_ASSERT(aImage);
-  nsStyleSides cropRect;
-  aImage->SetCropRect(MakeUnique<nsStyleSides>(cropRect));
+  aImage->SetCropRect(MakeUnique<nsStyleSides>());
 }
 
 void
 Gecko_SetCursorArrayLength(nsStyleUserInterface* aStyleUI, size_t aLen)
 {
   aStyleUI->mCursorImages.Clear();
   aStyleUI->mCursorImages.SetLength(aLen);
 }