diff --git a/handler/oauth2/flow_refresh.go b/handler/oauth2/flow_refresh.go
index 5bf68070..789f8d63 100644
--- a/handler/oauth2/flow_refresh.go
+++ b/handler/oauth2/flow_refresh.go
@@ -221,12 +221,14 @@ func (c *RefreshTokenGrantHandler) handleRefreshTokenEndpointStorageError(ctx co
 	if errors.Is(storageErr, fosite.ErrSerializationFailure) {
 		return errorsx.WithStack(fosite.ErrInvalidRequest.
 			WithDebugf(storageErr.Error()).
+			WithWrap(storageErr).
 			WithHint("Failed to refresh token because of multiple concurrent requests using the same token which is not allowed."))
 	}
 
 	if errors.Is(storageErr, fosite.ErrNotFound) || errors.Is(storageErr, fosite.ErrInactiveToken) {
 		return errorsx.WithStack(fosite.ErrInvalidRequest.
 			WithDebugf(storageErr.Error()).
+			WithWrap(storageErr).
 			WithHint("Failed to refresh token because of multiple concurrent requests using the same token which is not allowed."))
 	}