diff --git a/lib/BIP21.js b/lib/BIP21.js
index 9253f1a..f8930a6 100644
--- a/lib/BIP21.js
+++ b/lib/BIP21.js
@@ -61,7 +61,7 @@ BIP21.prototype.parse = function(uri) {
 
   for (var arg in info.query) {
     var val = info.query[arg];
-    if (arg == 'amount') val = Number(val);
+    if (arg === 'amount') val = Number(val);
     this.data[arg] = val;
   }
 }