diff --git a/src/currency.cpp b/src/currency.cpp
--- a/src/currency.cpp
+++ b/src/currency.cpp
@@ -96,6 +96,18 @@
                        symbolString,
                        ki18nc("amount in units (real)", "%1 Belgian francs"),
                        ki18ncp("amount in units (integer)", "%1 Belgian franc", "%1 Belgian francs")));
+    
+    addUnit(CustomUnit(CurrencyCategory, Byn, 0.4405286,
+                       QStringLiteral("BYN"),
+                       i18nc("currency name", "Belarusian Ruble"),
+                       i18nc("BYN Belarusian Ruble - unit synonyms for matching user input",
+                             "Belarusian ruble;Belarusian rubles;Belarusian rouble;Belarusian roubles")
+                       + QStringLiteral(";BYN;")
+                       + QLocale::countryToString(QLocale::Belarus) + QLatin1Char(';')
+                       + i18nc("currency name", "Belarusian Ruble"),
+                       symbolString,
+                       ki18nc("amount in units (real)", "%1 rubles"),
+                       ki18ncp("amount in units (integer)", "%1 ruble", "%1 rubles")));
 
     addUnit(CustomUnit(CurrencyCategory, Nlg, 0.45378,
                        QStringLiteral("NLG"),
diff --git a/src/unit.h b/src/unit.h
--- a/src/unit.h
+++ b/src/unit.h
@@ -130,7 +130,7 @@
     // Currency
     Eur = 8000, Ats, Bef, Nlg, Fim, Frf, Dem, Iep, Itl, Luf, Pte, Esp, Grd, Sit, Cyp, Mtl, Skk,
     Usd, Jpy, Bgn, Czk, Dkk, Eek, Gbp, Huf, Ltl, Lvl, Pln, Ron, Sek, Chf, Nok, Hrk, Rub, Try,
-    Aud, Brl, Cad, Cny, Hkd, Idr, Inr, Krw, Mxn, Myr, Nzd, Php, Sgd, Thb, Zar, Ils,
+    Aud, Brl, Cad, Cny, Hkd, Idr, Inr, Krw, Mxn, Myr, Nzd, Php, Sgd, Thb, Zar, Ils, Byn,
 
     // Velocity
     MeterPerSecond = 9000, KilometerPerHour, MilePerHour, FootPerSecond, InchPerSecond, Knot,