--- a/storage/src/mozStorageConnection.cpp
+++ b/storage/src/mozStorageConnection.cpp
@@ -594,18 +594,20 @@ Connection::internalClose()
 
   mDBConn = NULL;
   return convertResultCode(srv);
 }
 
 nsCString
 Connection::getFilename()
 {
-  nsCString leafname;
-  (void)mDatabaseFile->GetNativeLeafName(leafname);
+  nsCString leafname(":memory:");
+  if (mDatabaseFile) {
+    (void)mDatabaseFile->GetNativeLeafName(leafname);
+  }
   return leafname;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 //// mozIStorageConnection
 
 NS_IMETHODIMP
 Connection::Close()