diff --git a/gnucash/gnome/gnc-plugin-page-register.c b/gnucash/gnome/gnc-plugin-page-register.c
index bcf006f736..f8d4034b1e 100644
--- a/gnucash/gnome/gnc-plugin-page-register.c
+++ b/gnucash/gnome/gnc-plugin-page-register.c
@@ -4590,6 +4590,8 @@ static GncInvoice* invoice_from_split (Split* split)
 GList* invoices_from_transaction (Transaction* trans)
 {
     GList *invoices = NULL;
+    if (!trans) return NULL;
+
     for (GList *node = xaccTransGetAPARAcctSplitList(trans, TRUE); node;
          node = node->next)
     {