diff --git a/src/utility.rs b/src/utility.rs
index e6ad3d5..8dcca3e 100644
--- a/src/utility.rs
+++ b/src/utility.rs
@@ -1,3 +1,7 @@
 pub fn leak < 'l , Type > ( inner : Type ) -> & 'l Type {
 	Box :: leak ( Box :: new (inner) )
 }
+
+pub fn leak_mut < 'l , Type > ( inner : Type ) -> & 'l mut Type {
+	Box :: leak ( Box :: new (inner) )
+}