# MutantHub mutant #474: Logical operator mutation at psbt.cpp:449
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:449-449
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -449,1 +449,1 @@
-    if (final_script_witness.IsNull() && !input.final_script_witness.IsNull()) final_script_witness = input.final_script_witness;
+    if (final_script_witness.IsNull() || !input.final_script_witness.IsNull()) final_script_witness = input.final_script_witness;