diff --git a/src/frame/system.rs b/src/frame/system.rs
index 976238b52f..7039595356 100644
--- a/src/frame/system.rs
+++ b/src/frame/system.rs
@@ -80,6 +80,7 @@ pub trait System: 'static + Eq + Clone + Debug {
         + MaybeSerializeDeserialize
         + Debug
         + MaybeDisplay
+        + Ord
         + SimpleBitOps
         + Default
         + Copy