diff --git a/mozilla/netwerk/cache/filecache/nsDBEnumerator.cpp b/mozilla/netwerk/cache/filecache/nsDBEnumerator.cpp
index 8271372827e..2af65d66be6 100644
--- a/mozilla/netwerk/cache/filecache/nsDBEnumerator.cpp
+++ b/mozilla/netwerk/cache/filecache/nsDBEnumerator.cpp
@@ -50,7 +50,7 @@ nsDBEnumerator::~nsDBEnumerator()
 //
 // Implement nsISupports methods
 //
-NS_IMPL_ISUPPORTS(nsDBEnumerator, NS_GET_IID(nsIEnumerator))
+NS_IMPL_ISUPPORTS(nsDBEnumerator, NS_GET_IID(nsISimpleEnumerator))
 
 /////////////////////////////////////////////////////////////////
 // nsISimpleEnumerator methods