diff --git a/crates/egui/src/context.rs b/crates/egui/src/context.rs
index 982f7d146..ff9e295be 100644
--- a/crates/egui/src/context.rs
+++ b/crates/egui/src/context.rs
@@ -2046,7 +2046,7 @@ impl Context {
 
     /// Register a [`ThemeStyle`](crate::theme_plugin::ThemeStyle) for the specified widget.
     ///
-    /// Overwrite any theme already registered for the specified widget [`WidgetStyle`](WidgetStyle).
+    /// Overwrite any theme already registered for the specified widget [`WidgetStyle`].
     /// This allow to live edit a theme.
     pub fn replace_widget_theme<S: WidgetStyle + 'static>(
         &self,
diff --git a/crates/egui/src/theme_plugin.rs b/crates/egui/src/theme_plugin.rs
index faa685248..724a22c13 100644
--- a/crates/egui/src/theme_plugin.rs
+++ b/crates/egui/src/theme_plugin.rs
@@ -228,12 +228,27 @@ impl Default for Themes {
             Arc::new(Mutex::new(Box::new(DefaultStyle))),
         );
 
+        themes.insert_temp::<ThemeWrap<SeparatorStyle>>(
+            Id::NULL,
+            Arc::new(Mutex::new(Box::new(DefaultStyle))),
+        );
+
+        themes.insert_temp::<ThemeWrap<CheckboxStyle>>(
+            Id::NULL,
+            Arc::new(Mutex::new(Box::new(DefaultStyle))),
+        );
+
+        themes.insert_temp::<ThemeWrap<LabelStyle>>(
+            Id::NULL,
+            Arc::new(Mutex::new(Box::new(DefaultStyle))),
+        );
+
         Self { themes }
     }
 }
 
 impl Themes {
-    /// Register a [`ThemeStyle`](crate::theme_plugin::ThemeStyle) for the specified widget [`WidgetStyle`](WidgetStyle) `S`
+    /// Register a [`ThemeStyle`] for the specified widget [`WidgetStyle`] `S`
     ///
     /// Existing themes are overwritten if `force` is `true` or the new theme differs.
     pub(crate) fn register<S: WidgetStyle + 'static>(