diff --git a/lib/dwolla.js b/lib/dwolla.js
index cfdea97..20cc5f7 100644
--- a/lib/dwolla.js
+++ b/lib/dwolla.js
@@ -481,7 +481,7 @@ exports.deposit = function(oauth_token, pin, sourceId, amount, fn) {
     params.pin = pin;
     params.sourceId= sourceId;
     params.amount = amount;
-    _post('/fundingsources/' + id + '/withdraw', params, fn);
+    _post('/fundingsources/' + sourceId + '/withdraw', params, fn);
 };
 
 /**