# MutantHub mutant #3878: Arithmetic operator mutation at operation_patterns.ipp:96
# Repository: libbitcoin/libbitcoin-system @ c37c9b73278f1f97e6eb6421f3544f5e58edba2f
# File: include/bitcoin/system/impl/chain/operation_patterns.ipp:96-96
# Review: APPROVED; outcome: KILLED
--- a/include/bitcoin/system/impl/chain/operation_patterns.ipp
+++ b/include/bitcoin/system/impl/chain/operation_patterns.ipp
@@ -96,1 +96,1 @@
-    return static_cast<opcode>(value + sub1(op_81));
+    return static_cast<opcode>(value - sub1(op_81));