diff --git a/libheif/file.cc b/libheif/file.cc
index da7f28a87aa..b15c778a6fc 100644
--- a/libheif/file.cc
+++ b/libheif/file.cc
@@ -758,12 +758,12 @@ Error HeifFile::get_compressed_image_data(heif_item_id ID, std::vector<uint8_t>*
 
   if (item_type == "iden") {
     // we want to return the image data for the source image
-    heif_item_id from_ID;
-    Error error = get_source_image_id(ID, &from_ID);
+    heif_item_id to_ID;
+    Error error = get_source_image_id(ID, &to_ID);
     if (error) {
       return error;
     }
-    ID = from_ID;
+    ID = to_ID;
   }
 
   // --- get coded image data pointers