diff --git a/src/gnome-utils/dialog-book-close.c b/src/gnome-utils/dialog-book-close.c
index a2b46aad84..a0e3c2fdd3 100644
--- a/src/gnome-utils/dialog-book-close.c
+++ b/src/gnome-utils/dialog-book-close.c
@@ -102,7 +102,14 @@ find_or_create_txn(struct CloseAccountsCB* cacb, gnc_commodity* cmdty)
         txn->txn = xaccMallocTransaction(cacb->cbw->book);
         xaccTransBeginEdit(txn->txn);
         xaccTransSetDateEnteredSecs(txn->txn, gnc_time (NULL));
-        xaccTransSetDatePostedSecsNormalized(txn->txn, cacb->cbw->close_date);
+
+        /* Watch out: The book-closing txn currently assume that their
+        posted-date is the end date plus 12 hours, so that the closing txn can
+        be distinguished from normal txns of the last day. This is the only
+        case within GnuCash where the PostedDate is a different time-of-day
+        that what the GDate normally says as a normalized date. */
+        xaccTransSetDatePostedSecs(txn->txn, cacb->cbw->close_date);
+
         xaccTransSetDescription(txn->txn, cacb->cbw->desc);
         xaccTransSetCurrency(txn->txn, cmdty);
         xaccTransSetIsClosingTxn(txn->txn, TRUE);