diff --git a/gnucash/report/standard-reports/average-balance.scm b/gnucash/report/standard-reports/average-balance.scm
index e0308299e0..07d2390656 100644
--- a/gnucash/report/standard-reports/average-balance.scm
+++ b/gnucash/report/standard-reports/average-balance.scm
@@ -293,11 +293,9 @@
          (internal-included (not (get-option gnc:pagename-accounts optname-internal)))
          (accounts   (get-option gnc:pagename-accounts (N_ "Accounts")))
          (dosubs?    (get-option gnc:pagename-accounts optname-subacct))
-         (accounts (append accounts
-                           (if dosubs?
-                               (filter (lambda (acc) (not (member acc accounts)))
-                                       (gnc:acccounts-get-all-subaccounts accounts))
-                               '())))
+         (accounts (if dosubs?
+                       (gnc:accounts-and-all-descendants accounts)
+                       accounts))
          (plot-type  (get-option gnc:pagename-display (N_ "Plot Type")))
          (show-plot? (get-option gnc:pagename-display (N_ "Show plot")))
          (show-table? (get-option gnc:pagename-display (N_ "Show table")))
diff --git a/gnucash/report/standard-reports/budget.scm b/gnucash/report/standard-reports/budget.scm
index e09c3124ff..16fcbe1a8a 100644
--- a/gnucash/report/standard-reports/budget.scm
+++ b/gnucash/report/standard-reports/budget.scm
@@ -638,11 +638,9 @@
                                        (get-option gnc:pagename-general
                                                    optname-period-collapse-after)))
          (doc (gnc:make-html-document))
-         (accounts (append accounts
-                           (filter (lambda (acc) (not (member acc accounts)))
-                                   (if show-subaccts?
-                                       (gnc:acccounts-get-all-subaccounts accounts)
-                                       '())))))
+         (accounts (if show-subaccts?
+                       (gnc:accounts-and-all-descendants accounts)
+                       accounts)))
     ;; end of defines
 
     (cond
diff --git a/gnucash/report/standard-reports/cash-flow.scm b/gnucash/report/standard-reports/cash-flow.scm
index fd61a006dd..9a35699d2a 100644
--- a/gnucash/report/standard-reports/cash-flow.scm
+++ b/gnucash/report/standard-reports/cash-flow.scm
@@ -156,11 +156,9 @@
          (table (gnc:make-html-table))
 
          ;;add subaccounts if requested
-         (accounts (append accounts
-                           (filter (lambda (acc) (not (member acc accounts)))
-                                   (if show-subaccts?
-                                       (gnc:acccounts-get-all-subaccounts accounts)
-                                       '()))))
+         (accounts (if show-subaccts?
+                       (gnc:accounts-and-all-descendants accounts)
+                       accounts))
          (accounts (sort accounts account-full-name<?)))
 
     (define (add-accounts-flow accounts accounts-alist)
diff --git a/gnucash/report/standard-reports/category-barchart.scm b/gnucash/report/standard-reports/category-barchart.scm
index 5de9ce386f..0da882b7d7 100644
--- a/gnucash/report/standard-reports/category-barchart.scm
+++ b/gnucash/report/standard-reports/category-barchart.scm
@@ -471,9 +471,7 @@ developing over time"))
           ;; needed so as to amortize the cpu time properly.
           (gnc:report-percent-done 1)
           (set! commodity-list (gnc:accounts-get-commodities
-                                (append
-                                 (gnc:acccounts-get-all-subaccounts accounts)
-                                 accounts)
+                                (gnc:accounts-and-all-descendants accounts)
                                 report-currency))
           (set! exchange-fn (gnc:case-exchange-time-fn
                              price-source report-currency
diff --git a/gnucash/report/standard-reports/daily-reports.scm b/gnucash/report/standard-reports/daily-reports.scm
index c836fa39a2..c00cc3b74e 100644
--- a/gnucash/report/standard-reports/daily-reports.scm
+++ b/gnucash/report/standard-reports/daily-reports.scm
@@ -204,10 +204,8 @@
           ;; lookup should be distributed and done when actually
           ;; needed so as to amortize the cpu time properly.
 	  (gnc:report-percent-done 1)
-	  (set! commodity-list (gnc:accounts-get-commodities 
-                                (append 
-                                 (gnc:acccounts-get-all-subaccounts accounts)
-                                 accounts)
+	  (set! commodity-list (gnc:accounts-get-commodities
+                                (gnc:accounts-and-all-descendants accounts)
                                 report-currency))
 	  (gnc:report-percent-done 5)
 	  (set! exchange-fn (gnc:case-exchange-time-fn 
diff --git a/gnucash/report/standard-reports/net-charts.scm b/gnucash/report/standard-reports/net-charts.scm
index 8defa587e0..d7574a2339 100644
--- a/gnucash/report/standard-reports/net-charts.scm
+++ b/gnucash/report/standard-reports/net-charts.scm
@@ -317,9 +317,7 @@
 
     (gnc:report-percent-done 1)
     (set! commodity-list (gnc:accounts-get-commodities
-                          (append
-                           (gnc:acccounts-get-all-subaccounts accounts)
-                           accounts)
+                          (gnc:accounts-and-all-descendants accounts)
                           report-currency))
     (gnc:report-percent-done 10)
     (set! exchange-fn (gnc:case-exchange-time-fn
diff --git a/gnucash/report/standard-reports/portfolio.scm b/gnucash/report/standard-reports/portfolio.scm
index 95f1df2721..7e985eb3ca 100644
--- a/gnucash/report/standard-reports/portfolio.scm
+++ b/gnucash/report/standard-reports/portfolio.scm
@@ -195,9 +195,8 @@
     ;(gnc:debug "accounts" accounts)
     (if (not (null? accounts))
         (let* ((commodity-list (gnc:accounts-get-commodities
-                                (append
-                                 (gnc:acccounts-get-all-subaccounts
-                                  accounts) accounts) currency))
+                                (gnc:accounts-and-all-descendants accounts)
+                                report-currency))
                (pricedb (gnc-pricedb-get-db (gnc-get-current-book)))
 	       (exchange-fn (gnc:case-exchange-fn price-source currency to-date))
                (price-fn