diff --git a/profile/dirserviceprovider/src/nsProfileLock.cpp b/profile/dirserviceprovider/src/nsProfileLock.cpp
index 6a58476d4fc..2f5385df92d 100644
--- a/profile/dirserviceprovider/src/nsProfileLock.cpp
+++ b/profile/dirserviceprovider/src/nsProfileLock.cpp
@@ -579,7 +579,7 @@ nsresult nsProfileLock::Lock(nsIFile* aProfileDir,
                                   0, // no sharing - of course
                                   nsnull,
                                   CREATE_ALWAYS,
-                                  nsnull,
+                                  0,
                                   nsnull);
     if (mLockFileHandle == INVALID_HANDLE_VALUE) {
         // XXXbsmedberg: provide a profile-unlocker here!