diff --git a/lib/modules/address.js b/lib/modules/address.js
index 7bddbe7c..c61e6786 100644
--- a/lib/modules/address.js
+++ b/lib/modules/address.js
@@ -496,11 +496,16 @@ AddressModule.prototype.getAddressHistoryForAddress = function(address, queryMem
           return callback(err);
         }
 
+        var confirmations = 0;
+        if(transaction.__height >= 0) {
+          confirmations = self.db.chain.tip.__height - transaction.__height;
+        }
+
         txinfos[transaction.hash] = {
           address: address,
           satoshis: 0,
           height: transaction.__height,
-          confirmations: self.db.chain.tip.__height - transaction.__height + 1,
+          confirmations: confirmations,
           timestamp: transaction.__timestamp,
           fees: transaction.getFee(),
           outputIndexes: [],