diff --git a/components/salsa-2022/src/input_field.rs b/components/salsa-2022/src/input_field.rs
index fcd9c706..187dafa7 100644
--- a/components/salsa-2022/src/input_field.rs
+++ b/components/salsa-2022/src/input_field.rs
@@ -1,6 +1,7 @@
 use crate::cycle::CycleRecoveryStrategy;
 use crate::ingredient::{fmt_index, Ingredient, IngredientRequiresReset};
 use crate::key::DependencyIndex;
+use crate::plumbing::transmute_lifetime;
 use crate::runtime::local_state::QueryOrigin;
 use crate::runtime::StampedValue;
 use crate::{AsId, DatabaseKeyIndex, Durability, Id, IngredientIndex, Revision, Runtime};
@@ -104,14 +105,6 @@ where
     }
 }
 
-// Returns `u` but with the lifetime of `t`.
-//
-// Safe if you know that data at `u` will remain shared
-// until the reference `t` expires.
-unsafe fn transmute_lifetime<'t, 'u, T, U>(_t: &'t T, u: &'u U) -> &'t U {
-    std::mem::transmute(u)
-}
-
 impl<DB: ?Sized, K, F> Ingredient<DB> for InputFieldIngredient<K, F>
 where
     K: AsId,
diff --git a/components/salsa-2022/src/interned.rs b/components/salsa-2022/src/interned.rs
index 80d78f87..a54132f5 100644
--- a/components/salsa-2022/src/interned.rs
+++ b/components/salsa-2022/src/interned.rs
@@ -8,6 +8,7 @@ use crate::durability::Durability;
 use crate::id::AsId;
 use crate::ingredient::{fmt_index, IngredientRequiresReset};
 use crate::key::DependencyIndex;
+use crate::plumbing::transmute_lifetime;
 use crate::runtime::local_state::QueryOrigin;
 use crate::runtime::Runtime;
 use crate::DatabaseKeyIndex;
@@ -181,14 +182,6 @@ where
     }
 }
 
-// Returns `u` but with the lifetime of `t`.
-//
-// Safe if you know that data at `u` will remain shared
-// until the reference `t` expires.
-unsafe fn transmute_lifetime<'t, 'u, T, U>(_t: &'t T, u: &'u U) -> &'t U {
-    std::mem::transmute(u)
-}
-
 impl<DB: ?Sized, Id, Data> Ingredient<DB> for InternedIngredient<Id, Data>
 where
     Id: InternedId,
diff --git a/components/salsa-2022/src/plumbing.rs b/components/salsa-2022/src/plumbing.rs
index 65a06451..f5e95d98 100644
--- a/components/salsa-2022/src/plumbing.rs
+++ b/components/salsa-2022/src/plumbing.rs
@@ -26,3 +26,11 @@ pub unsafe fn create_jars_inplace<DB: HasJars>(init: impl FnOnce(*mut DB::Jars))
         unsafe { Box::from_raw(place) }
     }
 }
+
+// Returns `u` but with the lifetime of `t`.
+//
+// Safe if you know that data at `u` will remain shared
+// until the reference `t` expires.
+pub(crate) unsafe fn transmute_lifetime<'t, 'u, T, U>(_t: &'t T, u: &'u U) -> &'t U {
+    std::mem::transmute(u)
+}