diff --git a/lib/plugins/wallet/geth/base.js b/lib/plugins/wallet/geth/base.js
index dc89a08a..d01ff49a 100644
--- a/lib/plugins/wallet/geth/base.js
+++ b/lib/plugins/wallet/geth/base.js
@@ -78,7 +78,7 @@ function balance (account, cryptoCode, settings, operatorId) {
 
 const pendingBalance = (address, cryptoCode) => {
   const promises = [_balance(true, address, cryptoCode), _balance(false, address, cryptoCode)]
-  return Promise.all(promises).then(([pending, confirmed]) => pending - confirmed)
+  return Promise.all(promises).then(([pending, confirmed]) => pending.minus(confirmed))
 }
 const confirmedBalance = (address, cryptoCode) => _balance(false, address, cryptoCode)