diff --git a/ChangeLog b/ChangeLog
index 3daeb5160..adc55a73b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2012-03-12  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
+	* OpenChange/MAPIStoreGCSMessage.m
+	(-getPidTagPredecessorChangeList:inMemCtx:): when the list is
+	missing, request a synchronisation from the container as the
+	message might now have been synchronised yet...
+
 	* OpenChange/MAPIStoreTypes.m (MAPICNCompare): new function that
 	returns an NSComparisonResult for two change numbers (reverse
 	format).
diff --git a/OpenChange/MAPIStoreGCSMessage.m b/OpenChange/MAPIStoreGCSMessage.m
index 78fe155f5..4d7ea0c07 100644
--- a/OpenChange/MAPIStoreGCSMessage.m
+++ b/OpenChange/MAPIStoreGCSMessage.m
@@ -150,13 +150,21 @@
 {
   int rc = MAPISTORE_SUCCESS;
   NSData *changeList;
+  MAPIStoreGCSFolder *parentFolder;
 
   if (isNew)
     rc = MAPISTORE_ERR_NOT_FOUND;
   else
     {
-      changeList = [(MAPIStoreGCSFolder *)[self container]
-                                          predecessorChangeListForMessageWithKey: [self nameInContainer]];
+      parentFolder = (MAPIStoreGCSFolder *)[self container];
+      changeList = [parentFolder
+                     predecessorChangeListForMessageWithKey: [self nameInContainer]];
+      if (!changeList)
+        {
+          [parentFolder synchroniseCache];
+          changeList = [parentFolder
+                         predecessorChangeListForMessageWithKey: [self nameInContainer]];
+        }
       if (!changeList)
         abort ();
       *data = [changeList asBinaryInMemCtx: memCtx];