diff --git a/src/layout/id.rs b/src/layout/id.rs
index 91c6241..99a78af 100644
--- a/src/layout/id.rs
+++ b/src/layout/id.rs
@@ -41,6 +41,7 @@ pub struct WidgetId<W = AnyWidget> {
 /// but they don't send drop messages to Ui.
 /// Ideally I'd have an enum or something that lets you use either, but that doesn't seem worth it
 /// right now; it's good enough and relatively cheap.
+#[repr(C)]
 pub struct StaticWidgetId<W = AnyWidget> {
     pub(super) ty: TypeId,
     pub(super) id: CopyId,
@@ -83,7 +84,7 @@ impl<W> WidgetId<W> {
     }
 
     pub fn as_any(&self) -> &WidgetId<AnyWidget> {
-        // safety: self is repr(C) and generic only used for phantom data
+        // SAFETY: self is repr(C) and generic only used for phantom data
         unsafe { std::mem::transmute(self) }
     }
 
@@ -92,7 +93,7 @@ impl<W> WidgetId<W> {
     }
 
     pub(super) fn cast_type<W2>(self) -> WidgetId<W2> {
-        // safety: self is repr(C) and generic only used for phantom data
+        // SAFETY: self is repr(C) and generic only used for phantom data
         unsafe { std::mem::transmute(self) }
     }
 
@@ -196,6 +197,7 @@ impl<W> StaticWidgetId<W> {
         WidgetId::new(self.id.id(), self.ty, send.clone(), true)
     }
     pub fn any(self) -> StaticWidgetId<AnyWidget> {
+        // SAFETY: self is repr(C)
         unsafe { std::mem::transmute(self) }
     }
 }
diff --git a/src/layout/widgets.rs b/src/layout/widgets.rs
index c985376..4fbbb3a 100644
--- a/src/layout/widgets.rs
+++ b/src/layout/widgets.rs
@@ -35,7 +35,7 @@ impl Widgets {
     /// get_dyn but dynamic borrow checking of widgets
     /// lets you do recursive (tree) operations, like the painter does
     pub fn get_dyn_dynamic(&self, id: &Id) -> WidgetWrapper<'_> {
-        // must guarantee no other mutable references to this widget exist
+        // SAFETY: must guarantee no other mutable references to this widget exist
         // done through the borrow variable
         let data: &mut WidgetData = unsafe { std::mem::transmute(self.map.get(id)) };
         if data.borrowed {