diff --git a/src/settings.cpp b/src/settings.cpp
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1511,11 +1511,11 @@ const SettingDesc _patch_settings[] = {
 };
 
 static const SettingDesc _currency_settings[] = {
-	SDT_VAR(CurrencySpec, rate,    SLE_UINT16, S, 0,  1, 0, 100, 0, STR_NULL, NULL),
-	SDT_CHR(CurrencySpec, separator,           S, 0,        ".",    STR_NULL, NULL),
-	SDT_VAR(CurrencySpec, to_euro,  SLE_INT32, S, 0,  0, 0, 3000, 0, STR_NULL, NULL),
-	SDT_STR(CurrencySpec, prefix,   SLE_STRBQ, S, 0,       NULL,    STR_NULL, NULL),
-	SDT_STR(CurrencySpec, suffix,   SLE_STRBQ, S, 0, " credits",    STR_NULL, NULL),
+	SDT_VAR(CurrencySpec, rate,    SLE_UINT16, S, 0, 1,      0, UINT16_MAX, 0, STR_NULL, NULL),
+	SDT_CHR(CurrencySpec, separator,           S, 0, ".",                      STR_NULL, NULL),
+	SDT_VAR(CurrencySpec, to_euro,  SLE_INT32, S, 0, 0, MIN_YEAR, MAX_YEAR, 0, STR_NULL, NULL),
+	SDT_STR(CurrencySpec, prefix,   SLE_STRBQ, S, 0, NULL,                     STR_NULL, NULL),
+	SDT_STR(CurrencySpec, suffix,   SLE_STRBQ, S, 0, " credits",               STR_NULL, NULL),
 	SDT_END()
 };