diff --git a/structures.h b/structures.h
index 7033872..ad4360f 100644
--- a/structures.h
+++ b/structures.h
@@ -297,8 +297,10 @@ struct message_media {
     struct encr_audio encr_audio;
     struct encr_document encr_document;
     struct encr_file encr_file;
-    void *data;
-    int data_size;
+    struct {
+      void *data;
+      int data_size;
+    };
   };
 };