diff --git a/mozilla/rdf/base/src/nsRDFXMLDataSource.cpp b/mozilla/rdf/base/src/nsRDFXMLDataSource.cpp
index 4b94a7fc294..e4ed84d0a8f 100644
--- a/mozilla/rdf/base/src/nsRDFXMLDataSource.cpp
+++ b/mozilla/rdf/base/src/nsRDFXMLDataSource.cpp
@@ -819,7 +819,7 @@ RDFXMLDataSourceImpl::Flush(void)
     nsFileURL url(mURLSpec, PR_TRUE);
     nsFileSpec path(url);
 
-    nsOutputFileStream out(path, nsOutputFileStream::kDefaultMode, 0755);
+    nsOutputFileStream out(path);
     if (! out.is_open())
         return NS_ERROR_FAILURE;