# MutantHub mutant #3932: Arithmetic operator mutation at validation.cpp:376
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:376-376
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -376,1 +376,1 @@
-                const auto mempool_spend_height{m_chain.Tip()->nHeight + 1};
+                const auto mempool_spend_height{m_chain.Tip()->nHeight - 1};