diff --git a/server/src/graphql.rs b/server/src/graphql.rs
index 80145ee..2d548c7 100644
--- a/server/src/graphql.rs
+++ b/server/src/graphql.rs
@@ -331,10 +331,15 @@ impl QueryRoot {
             notmuch_results.len(),
         );
 
-        let results: Vec<_> = newsreader_results
+        let mut results: Vec<_> = newsreader_results
             .into_iter()
             .chain(notmuch_results)
             .collect();
+        // The leading '-' is to reverse sort
+        results.sort_by_key(|item| match item {
+            ThreadSummaryCursor::Newsreader(_, ts) => -ts.timestamp,
+            ThreadSummaryCursor::Notmuch(_, ts) => -ts.timestamp,
+        });
         let ids = results
             .into_iter()
             .map(|r| match r {