diff --git a/src/engine/gnc-commodity.c b/src/engine/gnc-commodity.c
index bc9fdd2f82..c19d9b11ee 100644
--- a/src/engine/gnc-commodity.c
+++ b/src/engine/gnc-commodity.c
@@ -84,7 +84,7 @@ struct gnc_new_iso_code
   const char *old_code;
   const char *new_code;
 } gnc_new_iso_codes[] = {
-  {"RUB", "RUR"}, /* Russian Ruble */
+  {"RUR", "RUB"}, /* Russian Ruble: RUR through 1997-12, RUB from 1998-01 onwards; see bug #393185 */
   {"PLZ", "PLN"}, /* Polish Zloty */
   {"UAG", "UAH"}, /* Ukraine Hryvnia */
   {"ILS", "NIS"}, /* New Israeli Shekel */
diff --git a/src/engine/iso-4217-currencies.scm b/src/engine/iso-4217-currencies.scm
index b5b9ff947e..9609538c84 100644
--- a/src/engine/iso-4217-currencies.scm
+++ b/src/engine/iso-4217-currencies.scm
@@ -145,7 +145,7 @@
 ( "Qatari Rial" "rial" "dirham" "ISO4217" "QAR" "634" 100 100 )
 ( "Romanian Leu" "leu" "bani"  "ISO4217" "ROL" "642" 100 100 ) ;; through 2005-06
 ( "Romanian Leu" "leu" "bani"  "ISO4217" "RON" "946" 100 100 ) ;; from 2005-07
-( "Russian Rouble" "rouble" "kopek" "ISO4217" "RUR" "810" 100 100 )
+( "Russian Rouble" "rouble" "kopek" "ISO4217" "RUB" "810" 100 100 ) ;; RUR through 1997-12, RUB from 1998-01 onwards; see bug #393185
 ( "Rwanda Franc" "franc" "centime" "ISO4217" "RWF" "646" 100 100 )
 ( "Samoan Tala" "tala" "sene" "ISO4217" "WST" "882" 100 100 )
 ( "Sao Tome and Principe Dobra" "Dobra" "centimo" "ISO4217" "STD" "678" 100 100 )