diff --git a/netwerk/cache/public/nsICacheService.idl b/netwerk/cache/public/nsICacheService.idl
index cd3d98f8bd9..9255f3383f0 100644
--- a/netwerk/cache/public/nsICacheService.idl
+++ b/netwerk/cache/public/nsICacheService.idl
@@ -48,7 +48,7 @@ interface nsICacheListener;
 interface nsICacheSession;
 interface nsICacheVisitor;
 
-[scriptable, uuid(98dd0187-aad4-4cab-82c5-1adddef3629d)]
+[scriptable, uuid(de114eb4-29fc-4959-b2f7-2d03eb9bc771)]
 interface nsICacheService : nsISupports
 {
     /**
@@ -84,11 +84,6 @@ interface nsICacheService : nsISupports
      * Evicts all entries in all devices implied by the storage policy.
      */
     void evictEntries(in nsCacheStoragePolicy  storagePolicy);
-
-    /**
-     * This method is deprecated and will throw NS_ERROR_NOT_IMPLEMENTED.
-     */
-    ACString createTemporaryClientID(in nsCacheStoragePolicy storagePolicy);
 };
 
 %{C++
diff --git a/netwerk/cache/src/nsCacheService.cpp b/netwerk/cache/src/nsCacheService.cpp
index 959f512792c..e4be27e0469 100644
--- a/netwerk/cache/src/nsCacheService.cpp
+++ b/netwerk/cache/src/nsCacheService.cpp
@@ -947,12 +947,6 @@ NS_IMETHODIMP nsCacheService::EvictEntries(nsCacheStoragePolicy storagePolicy)
     return  EvictEntriesForClient(nsnull, storagePolicy);
 }
 
-NS_IMETHODIMP nsCacheService::CreateTemporaryClientID(nsCacheStoragePolicy storagePolicy,
-                                                      nsACString &clientID)
-{
-    return NS_ERROR_NOT_IMPLEMENTED;
-}
-
 /**
  * Internal Methods
  */