diff --git a/crates/bevy_ui/src/render/render_pass.rs b/crates/bevy_ui/src/render/render_pass.rs
index c464b2a585..697aa11104 100644
--- a/crates/bevy_ui/src/render/render_pass.rs
+++ b/crates/bevy_ui/src/render/render_pass.rs
@@ -112,6 +112,11 @@ impl PhaseItem for TransparentUi {
         self.draw_function
     }
 
+    #[inline]
+    fn sort(items: &mut [Self]) {
+        items.sort_by_key(|item| item.sort_key());
+    }
+
     #[inline]
     fn batch_size(&self) -> usize {
         self.batch_size