diff --git a/lib/btc/amount.js b/lib/btc/amount.js
index f0df4f39..0e93a48d 100644
--- a/lib/btc/amount.js
+++ b/lib/btc/amount.js
@@ -488,7 +488,7 @@ Amount.parse = function parse(value, exp, num) {
 Amount.parseUnsafe = function parseUnsafe(value, exp, num) {
   if (typeof value === 'string') {
     assert(util.isFloat(value), 'Non-BTC value for conversion.');
-    value = parseFloat(value, 10);
+    value = parseFloat(value);
   } else {
     assert(util.isNumber(value), 'Non-BTC value for conversion.');
     assert(num, 'Cannot parse number.');