diff --git a/lib/wallet/wallet.js b/lib/wallet/wallet.js
index daf8f5af..f794e75c 100644
--- a/lib/wallet/wallet.js
+++ b/lib/wallet/wallet.js
@@ -1244,7 +1244,7 @@ class Wallet extends EventEmitter {
     const mtx = new MTX();
 
     assert(Array.isArray(outputs), 'Outputs must be an array.');
-    assert(outputs.length > 0, 'No outputs available.');
+    assert(outputs.length > 0, 'At least one output required.');
 
     // Add the outputs
     for (const obj of outputs) {