From e50cbd7afcc5a4146da8868b3031edd7d727d592 Mon Sep 17 00:00:00 2001
From: Gregory Sanders <gsanders87@gmail.com>
Date: Wed, 12 Jun 2019 10:24:01 -0400
Subject: [PATCH] FundTransaction: mark all change keys as kept

---
 src/wallet/wallet.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index c86ab1d269..6bc7a3d2d8 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2700,6 +2700,11 @@ bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nC
         }
     }
 
+    // Mark all un-returned change keys as used to reduce privacy loss
+    for (auto& changekey : vChangeKey) {
+        changekey->KeepKey();
+    }
+
     return true;
 }