diff --git a/libheif/codecs/hevc.cc b/libheif/codecs/hevc.cc
index f0f7b89a99..3de4637cb6 100644
--- a/libheif/codecs/hevc.cc
+++ b/libheif/codecs/hevc.cc
@@ -640,24 +640,22 @@ Error parse_sps_for_hvcC_configuration(const uint8_t* sps, size_t size,
 
 
 
-ImageItem_HEVC::ImageItem_HEVC(HeifContext* ctx, heif_item_id id)
-: ImageItem(ctx, id)
+Error ImageItem_HEVC::on_load_file()
 {
-  auto hvcC_box = ctx->get_heif_file()->get_property<Box_hvcC>(id);
-  assert(hvcC_box);
-#if 0
+  auto hvcC_box = get_file()->get_property<Box_hvcC>(get_id());
   if (!hvcC_box) {
     return Error{heif_error_Invalid_input,
                  heif_suberror_No_hvcC_box};
   }
-#endif
 
   m_decoder = std::make_shared<Decoder_HEVC>(hvcC_box);
 
   DataExtent extent;
-  extent.set_from_image_item(ctx->get_heif_file().get(), id);
+  extent.set_from_image_item(get_context()->get_heif_file().get(), get_id());
 
   m_decoder->set_data_extent(extent);
+
+  return Error::Ok;
 }
 
 
diff --git a/libheif/codecs/hevc.h b/libheif/codecs/hevc.h
index 0cfe2dc22e..c389e13734 100644
--- a/libheif/codecs/hevc.h
+++ b/libheif/codecs/hevc.h
@@ -124,7 +124,7 @@ Error parse_sps_for_hvcC_configuration(const uint8_t* sps, size_t size,
 class ImageItem_HEVC : public ImageItem
 {
 public:
-  ImageItem_HEVC(HeifContext* ctx, heif_item_id id);
+  ImageItem_HEVC(HeifContext* ctx, heif_item_id id) : ImageItem(ctx, id) {}
 
   ImageItem_HEVC(HeifContext* ctx) : ImageItem(ctx) {}
 
@@ -137,6 +137,8 @@ class ImageItem_HEVC : public ImageItem
 
   heif_compression_format get_compression_format() const override { return heif_compression_HEVC; }
 
+  Error on_load_file() override;
+
   int get_luma_bits_per_pixel() const override;
 
   int get_chroma_bits_per_pixel() const override;