# MutantHub mutant #869: Arithmetic operator mutation at descriptor.cpp:2378
# Repository: bitcoin/bitcoin @ 1aafd49077041e874d6b5f114927bc37e5b85d71
# File: src/script/descriptor.cpp:2378-2378
# Review: APPROVED; outcome: KILLED
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -2378,1 +2378,1 @@
-            script_size += pks.at(0)->GetSize() + 1;
+            script_size += pks.at(0)->GetSize() - 1;