diff --git a/bindings/python/src/utils/normalization.rs b/bindings/python/src/utils/normalization.rs
index 4cb3c7ce8..b67dcff9c 100644
--- a/bindings/python/src/utils/normalization.rs
+++ b/bindings/python/src/utils/normalization.rs
@@ -396,7 +396,7 @@ impl DestroyPtr for PyNormalizedStringRefMut {
 }
 
 impl PyNormalizedStringRefMut {
-    pub fn new(normalized: &mut NormalizedString) -> RefMutGuard<Self> {
+    pub fn new(normalized: &mut NormalizedString) -> RefMutGuard<'_, Self> {
         RefMutGuard::new(Self {
             inner: RefMutContainer::new(normalized),
         })
diff --git a/bindings/python/src/utils/pretokenization.rs b/bindings/python/src/utils/pretokenization.rs
index 021a8ec90..70444aace 100644
--- a/bindings/python/src/utils/pretokenization.rs
+++ b/bindings/python/src/utils/pretokenization.rs
@@ -272,7 +272,7 @@ impl DestroyPtr for PyPreTokenizedStringRefMut {
 }
 
 impl PyPreTokenizedStringRefMut {
-    pub fn new(pretok: &mut tk::PreTokenizedString) -> RefMutGuard<Self> {
+    pub fn new(pretok: &mut tk::PreTokenizedString) -> RefMutGuard<'_, Self> {
         // SAFETY: This is safe because we return a RefMutGuard here.
         // The compiler will make sure the &mut stays valid as necessary.
         RefMutGuard::new(Self {