diff --git a/libgnucash/engine/SX-book.c b/libgnucash/engine/SX-book.c
index d8d8c27db6..15eb1943bc 100644
--- a/libgnucash/engine/SX-book.c
+++ b/libgnucash/engine/SX-book.c
@@ -281,6 +281,7 @@ book_sxes_end(QofBook* book)
     sxes = qof_collection_get_data(col);
     if (sxes != NULL)
     {
+        g_list_free (sxes->sx_list);
         g_object_unref(sxes);
         qof_collection_set_data(col, NULL);
     }