diff --git a/src/utils/error.rs b/src/utils/error.rs
index d855d737..53593f73 100644
--- a/src/utils/error.rs
+++ b/src/utils/error.rs
@@ -9,6 +9,7 @@ use ruma::{
     OwnedServerName,
 };
 use thiserror::Error;
+use wee_woo::ErrorExt;
 
 use crate::{observability::prelude::*, Ra};
 
@@ -117,7 +118,7 @@ impl Error {
             return Ra(UiaaResponse::MatrixError(error));
         }
 
-        let message = format!("{self}");
+        let message = format!("{}", self.display_with_sources(" -> "));
 
         let (kind, status_code) = match self {
             Self::BadRequest(kind, _) => (