diff --git a/src/r0/media/get_content_thumbnail.rs b/src/r0/media/get_content_thumbnail.rs
index 54b5ef40..ad73e327 100644
--- a/src/r0/media/get_content_thumbnail.rs
+++ b/src/r0/media/get_content_thumbnail.rs
@@ -63,7 +63,7 @@ ruma_api! {
         pub content_type: String,
 
         /// A thumbnail of the requested content.
-        #[ruma_api(body)]
+        #[ruma_api(raw_body)]
         pub file: Vec<u8>,
     }