# MutantHub mutant #476: Logical operator mutation at psbt.cpp:451
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:451-451
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -451,1 +451,1 @@
-    if (m_tap_internal_key.IsNull() && !input.m_tap_internal_key.IsNull()) m_tap_internal_key = input.m_tap_internal_key;
+    if (m_tap_internal_key.IsNull() || !input.m_tap_internal_key.IsNull()) m_tap_internal_key = input.m_tap_internal_key;