# MutantHub mutant #405: Logical operator mutation at psbt.cpp:189
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:189-189
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -189,1 +189,1 @@
-    if (!m_tx_modifiable.has_value() || !m_tx_modifiable->test(0)) {
+    if (!m_tx_modifiable.has_value() && !m_tx_modifiable->test(0)) {