diff --git a/src/context.rs b/src/context.rs
index 0cb8ae0..1146fdd 100644
--- a/src/context.rs
+++ b/src/context.rs
@@ -776,7 +776,6 @@ impl<'context, 'window> WidgetContext<'context, 'window> {
             cache: WidgetCacheKey {
                 theme_mode,
                 enabled,
-                invalidation: current_node.invalidation(),
             },
             cursor,
             current_node,
@@ -826,7 +825,6 @@ impl<'context, 'window> WidgetContext<'context, 'window> {
                 cache: WidgetCacheKey {
                     theme_mode,
                     enabled: current_node.enabled(&self.handle()),
-                    invalidation: current_node.invalidation(),
                 },
                 current_node,
                 redraw_status: self.redraw_status,
@@ -1263,7 +1261,6 @@ impl<T> MapManagedWidget<T> for ManagedWidget {
 pub struct WidgetCacheKey {
     theme_mode: ThemeMode,
     enabled: bool,
-    invalidation: u64,
 }
 
 impl Default for WidgetCacheKey {
@@ -1271,7 +1268,6 @@ impl Default for WidgetCacheKey {
         Self {
             theme_mode: ThemeMode::default().inverse(),
             enabled: false,
-            invalidation: u64::MAX,
         }
     }
 }
diff --git a/src/tree.rs b/src/tree.rs
index 462fbf7..afdf43f 100644
--- a/src/tree.rs
+++ b/src/tree.rs
@@ -45,7 +45,6 @@ impl Tree {
             effective_styles,
             theme: None,
             theme_mode: None,
-            invalidation: 0,
         });
         data.nodes_by_id.insert(id, node_id);
         if widget.is_default() {
@@ -282,11 +281,6 @@ impl Tree {
         data.widget_from_node(id, self)
     }
 
-    pub(crate) fn invalidation(&self, id: LotId) -> Option<u64> {
-        let data = self.data.lock().ignore_poison();
-        data.nodes.get(id).map(|node| node.invalidation)
-    }
-
     pub(crate) fn is_enabled(&self, mut id: LotId, context: &WindowHandle) -> bool {
         let data = self.data.lock().ignore_poison();
         loop {
@@ -513,7 +507,6 @@ impl TreeData {
         let mut node = &mut self.nodes[id];
         while node.layout.is_some() {
             node.layout = None;
-            node.invalidation += 1;
             node.last_layout_query = None;
 
             let (true, Some(parent)) = (include_hierarchy, node.parent) else {
@@ -585,7 +578,6 @@ struct Node {
     children: Vec<LotId>,
     parent: Option<LotId>,
     layout: Option<Rect<Px>>,
-    invalidation: u64,
     last_layout_query: Option<CachedLayoutQuery>,
     associated_styles: Option<Value<Styles>>,
     effective_styles: Styles,
diff --git a/src/widget.rs b/src/widget.rs
index 4673918..c063c23 100644
--- a/src/widget.rs
+++ b/src/widget.rs
@@ -1186,10 +1186,6 @@ impl ManagedWidget {
         self.tree.is_enabled(self.node_id, handle)
     }
 
-    pub(crate) fn invalidation(&self) -> u64 {
-        self.tree.invalidation(self.node_id).expect("missing node")
-    }
-
     /// Returns true if this widget is currently the hovered widget.
     #[must_use]
     pub fn hovered(&self) -> bool {