diff --git a/crates/egui/src/util/undoer.rs b/crates/egui/src/util/undoer.rs
index 0b64a1c4a35b..7520ed77e38a 100644
--- a/crates/egui/src/util/undoer.rs
+++ b/crates/egui/src/util/undoer.rs
@@ -67,9 +67,10 @@ pub struct Undoer<State> {
 
 impl<State> std::fmt::Debug for Undoer<State> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let Self { undos, .. } = self;
+        let Self { undos, redos, .. } = self;
         f.debug_struct("Undoer")
             .field("undo count", &undos.len())
+            .field("redo count", &redos.len())
             .finish()
     }
 }