diff --git a/src/lifetime_expansion.rs b/src/lifetime_expansion.rs
index 867b643..da34c3f 100644
--- a/src/lifetime_expansion.rs
+++ b/src/lifetime_expansion.rs
@@ -25,13 +25,16 @@
 /// borrow data that's already been dropped.
 /// - Therefore, `val_b`, which has a lifetime of `'b`, is valid for `'a`.
 #[inline(never)]
-pub const fn lifetime_translator<'a, 'b, T>(_val_a: &'a &'b (), val_b: &'b T) -> &'a T {
+pub const fn lifetime_translator<'a, 'b, T: ?Sized>(_val_a: &'a &'b (), val_b: &'b T) -> &'a T {
 	val_b
 }
 
 /// This does the same thing as [`lifetime_translator`], just for mutable refs.
 #[inline(never)]
-pub fn lifetime_translator_mut<'a, 'b, T>(_val_a: &'a &'b (), val_b: &'b mut T) -> &'a mut T {
+pub fn lifetime_translator_mut<'a, 'b, T: ?Sized>(
+	_val_a: &'a &'b (),
+	val_b: &'b mut T,
+) -> &'a mut T {
 	val_b
 }
 
@@ -40,7 +43,7 @@ pub fn lifetime_translator_mut<'a, 'b, T>(_val_a: &'a &'b (), val_b: &'b mut T)
 /// # Safety
 ///
 /// Safety? What's that?
-pub fn expand<'a, 'b, T>(x: &'a T) -> &'b T {
+pub fn expand<'a, 'b, T: ?Sized>(x: &'a T) -> &'b T {
 	let f: fn(_, &'a T) -> &'b T = lifetime_translator;
 	f(STATIC_UNIT, x)
 }
@@ -50,7 +53,7 @@ pub fn expand<'a, 'b, T>(x: &'a T) -> &'b T {
 /// # Safety
 ///
 /// Safety? What's that?
-pub fn expand_mut<'a, 'b, T>(x: &'a mut T) -> &'b mut T {
+pub fn expand_mut<'a, 'b, T: ?Sized>(x: &'a mut T) -> &'b mut T {
 	let f: fn(_, &'a mut T) -> &'b mut T = lifetime_translator_mut;
 	f(STATIC_UNIT, x)
 }