diff --git a/src/js/ripple/currency.js b/src/js/ripple/currency.js
index e5b27fd7..e2521510 100644
--- a/src/js/ripple/currency.js
+++ b/src/js/ripple/currency.js
@@ -313,16 +313,18 @@ Currency.prototype.to_json = function(opts) {
     return 'XRP';
   }
 
+  var opts = opts || {};
+
   var currency;
   var fullName = opts && opts.full_name ? " - " + opts.full_name : "";
 
   // Any currency with standard properties and a valid code can be abbreviated
   // in the JSON wire format as the three character code.
-  if (/^[A-Z0-9]{3}$/.test(this._iso_code) && !this.has_interest()) {
+  if (!opts.force_hex && /^[A-Z0-9]{3}$/.test(this._iso_code) && !this.has_interest()) {
     currency = this._iso_code + fullName;
 
   // If there is interest, append the annual interest to the full currency name
-  } else if (this.has_interest()) {
+  } else if (!opts.force_hex && this.has_interest()) {
     var decimals = opts ? opts.decimals : undefined;
     currency = this._iso_code + fullName + " (" + this.get_interest_percentage_at(this._interest_start + 3600 * 24 * 365, decimals) + "%pa)";
   } else {
diff --git a/test/currency-test.js b/test/currency-test.js
index 65fc7879..e742017c 100644
--- a/test/currency-test.js
+++ b/test/currency-test.js
@@ -37,6 +37,22 @@ describe('Currency', function() {
       assert(!r.is_valid());
       assert.strictEqual('XRP', r.to_json());
     });
+    it('from_json("XAU").to_json() hex', function() {
+      var r = currency.from_json("XAU");
+      assert.strictEqual('0000000000000000000000005841550000000000', r.to_json({force_hex: true}));
+    });
+    it('from_json("XAU (0.5%pa").to_json() hex', function() {
+      var r = currency.from_json("XAU (0.5%pa)");
+      assert.strictEqual('015841550000000041F78E0A28CBF19200000000', r.to_json({force_hex: true}));
+    });
+    it('json_rewrite("015841550000000041F78E0A28CBF19200000000").to_json() hex', function() {
+      var r = currency.json_rewrite('015841550000000041F78E0A28CBF19200000000');
+      assert.strictEqual('XAU (0.5%pa)', r);
+    });
+    it('json_rewrite("015841550000000041F78E0A28CBF19200000000") hex', function() {
+      var r = currency.json_rewrite('015841550000000041F78E0A28CBF19200000000', {force_hex: true});
+      assert.strictEqual('015841550000000041F78E0A28CBF19200000000', r);
+    });
   });
 
   describe('from_human', function() {