diff --git a/lib/wallet/txdb.js b/lib/wallet/txdb.js
index 3e6169b1..9b5f79be 100644
--- a/lib/wallet/txdb.js
+++ b/lib/wallet/txdb.js
@@ -3164,7 +3164,12 @@ Details.prototype.setOutput = function setOutput(i, path) {
  */
 
 Details.prototype.getConfirmations = function getConfirmations() {
-  var depth = this.chainHeight - this.height;
+  var depth;
+
+  if (this.height === -1)
+    return 0;
+
+  depth = this.chainHeight - this.height;
 
   if (depth < 0)
     return 0;