diff --git a/src/currency.cpp b/src/currency.cpp
index 4abf7cbd9b..8d7ecbef7a 100644
--- a/src/currency.cpp
+++ b/src/currency.cpp
@@ -158,12 +158,17 @@ void CheckSwitchToEuro()
 }
 
 /**
- * Called only from newgrf.c.  Will fill _currency_specs array with
+ * Will fill _currency_specs array with
  * default values from origin_currency_specs
+ * Called only from newgrf.cpp and settings.cpp.
+ * @param preserve_custom will not reset custom currency (the latest one on the list)
+ *        if ever it is flagged to true. In which case, the total size of the memory to move
+ *        will be one currency spec less, thus preserving the custom curreny from been
+ *        overwritten.
  **/
-void ResetCurrencies()
+void ResetCurrencies(bool preserve_custom)
 {
-	memcpy(&_currency_specs, &origin_currency_specs, sizeof(origin_currency_specs));
+	memcpy(&_currency_specs, &origin_currency_specs, sizeof(origin_currency_specs) - (preserve_custom ? sizeof(_custom_currency) : 0));
 }
 
 /**
diff --git a/src/currency.h b/src/currency.h
index a72eab7d02..86b46e7133 100644
--- a/src/currency.h
+++ b/src/currency.h
@@ -40,7 +40,7 @@ extern CurrencySpec _currency_specs[NUM_CURRENCY];
 
 uint GetMaskOfAllowedCurrencies();
 void CheckSwitchToEuro();
-void ResetCurrencies();
+void ResetCurrencies(bool preserve_custom = true);
 StringID* BuildCurrencyDropdown();
 byte GetNewgrfCurrencyIdConverted(byte grfcurr_id);
 
diff --git a/src/settings.cpp b/src/settings.cpp
index d82eec7d72..1aec9d641a 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1685,6 +1685,7 @@ extern void CheckDifficultyLevels();
 void LoadFromConfig()
 {
 	IniFile *ini = ini_load(_config_file);
+	ResetCurrencies(false); // Initialize the array of curencies, without preserving the custom one
 	HandleSettingDescs(ini, ini_load_settings, ini_load_setting_list);
 	_grfconfig_newgame = GRFLoadConfig(ini, "newgrf", false);
 	_grfconfig_static  = GRFLoadConfig(ini, "newgrf-static", true);