diff --git a/accessible/mac/mozAccessible.mm b/accessible/mac/mozAccessible.mm
index 5bd916e72777..39ca37dba326 100644
--- a/accessible/mac/mozAccessible.mm
+++ b/accessible/mac/mozAccessible.mm
@@ -516,7 +516,7 @@ GetClosestInterestingAccessible(id anObject)
 struct RoleDescrMap
 {
   NSString* role;
-  const nsString& description;
+  const nsString description;
 };
 
 static const RoleDescrMap sRoleDescrMap[] = {