# MutantHub mutant #520: Constant replacement mutation at psbt.cpp:684
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:684-684
# Review: APPROVED; outcome: KILLED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -684,1 +684,1 @@
-        require_witness_sig = true;
+        require_witness_sig = false;