# MutantHub mutant #386: Constant replacement mutation at psbt.cpp:119
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:119-119
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -119,1 +119,1 @@
-    return fallback_locktime.value_or(0);
+    return fallback_locktime.value_or(0 - 1);