diff --git a/src/events/data.rs b/src/events/data.rs
index c0f3a1de9..b24f4aa30 100644
--- a/src/events/data.rs
+++ b/src/events/data.rs
@@ -66,7 +66,7 @@ impl Ord for EventData {
                 .as_ref()
                 .expect("T2 known to be well-defined by above.");
 
-            t1.cmp(t2)
+            t2.cmp(t1)
         } else {
             Ordering::Equal
         }