# MutantHub mutant #2350: Arithmetic operator mutation at coinselection.cpp:961
# Repository: bitcoin/bitcoin @ d1d85263f8ebb47ad4d6126ff992d4915dda026b
# File: src/wallet/coinselection.cpp:961-961
# Review: APPROVED; outcome: KILLED
--- a/src/wallet/coinselection.cpp
+++ b/src/wallet/coinselection.cpp
@@ -961,1 +961,1 @@
-    return std::accumulate(m_selected_inputs.cbegin(), m_selected_inputs.cend(), CAmount{0}, [](CAmount sum, const auto& coin) { return sum + coin->GetEffectiveValue(); }) + bump_fee_group_discount;
+    return std::accumulate(m_selected_inputs.cbegin(), m_selected_inputs.cend(), CAmount{0}, [](CAmount sum, const auto& coin) { return sum - coin->GetEffectiveValue(); }) + bump_fee_group_discount;