diff --git a/OpenChange/MAPIStoreContext.m b/OpenChange/MAPIStoreContext.m
index 82de03b75..1b370c2f3 100644
--- a/OpenChange/MAPIStoreContext.m
+++ b/OpenChange/MAPIStoreContext.m
@@ -550,7 +550,7 @@ static inline NSURL *CompleteURLFromMapistoreURI (const char *uri)
 {
   uint64_t newVersionNumber;
 
-  if (openchangedb_get_new_changeNumber (connInfo->oc_ctx, &newVersionNumber)
+  if (openchangedb_get_new_changeNumber (connInfo->oc_ctx, connInfo->username, &newVersionNumber)
       != MAPI_E_SUCCESS)
     abort ();
 
@@ -567,9 +567,9 @@ static inline NSURL *CompleteURLFromMapistoreURI (const char *uri)
 
   memCtx = talloc_zero(NULL, TALLOC_CTX);
   newChangeNumbers = [NSMutableArray arrayWithCapacity: max];
-  
+
   if (openchangedb_get_new_changeNumbers (connInfo->oc_ctx,
-                                          memCtx, max, &numbers)
+                                          memCtx, connInfo->username, max, &numbers)
       != MAPI_E_SUCCESS || numbers->cValues != max)
     abort ();
   for (count = 0; count < max; count++)