# MutantHub mutant #412: Constant replacement mutation at psbt.cpp:230
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:230-230
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -230,1 +230,1 @@
-        uint32_t new_timelock = fallback_locktime.value_or(0);
+        uint32_t new_timelock = fallback_locktime.value_or(0 - 1);