diff --git a/src/js/ripple/amount.js b/src/js/ripple/amount.js
index 6e257bb1..0e4f33d7 100644
--- a/src/js/ripple/amount.js
+++ b/src/js/ripple/amount.js
@@ -602,14 +602,14 @@ Amount.prototype.invert = function() {
  * \s*                          // any amount of whitespace
  * (-)?                         // optional dash
  * (\d+)                        // 1 or more digits
- * (\.(\d*))?                   // optional . character with any amount of digits
+ * (?:\.(\d*))?                 // optional . character with any amount of digits
  * \s*                          // any amount of whitespace
  * ([a-f0-9]{40}|[a-z0-9]{3})?  // optional 40 character hex string OR 3 letters
  * \s*                          // any amount of whitespace
  * $                            // end of string
  *
  */
-Amount.human_RE = /^\s*([a-z]{3}|[0-9]{3})?\s*(-)?(\d+)(\.(\d*))?\s*([a-f0-9]{40}|[a-z0-9]{3})?\s*$/i;
+Amount.human_RE = /^\s*([a-z]{3}|[0-9]{3})?\s*(-)?(\d+)(?:\.(\d*))?\s*([a-f0-9]{40}|[a-z0-9]{3})?\s*$/i;
 
 Amount.prototype.parse_human = function(j, opts) {
   opts = opts || {};
diff --git a/test/amount-test.js b/test/amount-test.js
index 26ec9fc7..93ab0093 100644
--- a/test/amount-test.js
+++ b/test/amount-test.js
@@ -16,6 +16,22 @@ describe('Amount', function() {
       assert(Amount.from_json('1').is_positive());
     });
   });
+  describe('from_human', function() {
+    it('1 XRP', function() {
+      assert.strictEqual(Amount.from_human("1 XRP").to_text_full(), '1/XRP');
+    });
+    it('0.1 XRP', function() {
+      assert.strictEqual(Amount.from_human("0.1 XRP").to_text_full(), '0.1/XRP');
+    });
+    it('0.1 USD', function() {
+      assert.strictEqual(Amount.from_human("0.1 USD").to_text_full(), '0.1/USD/NaN');
+    });
+  });
+  describe('from_json', function() {
+    it('1 XRP', function() {
+      assert.strictEqual(Amount.from_json("1/XRP").to_text_full(), "1/XRP/NaN");
+    });
+  });
   describe('from_number', function() {
     it('Number 1', function() {
       assert.strictEqual(Amount.from_number(1).to_text_full(), '1/1/rrrrrrrrrrrrrrrrrrrrBZbvji');