# MutantHub mutant #500: Logical operator mutation at psbt.cpp:545
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:545-545
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -545,1 +545,1 @@
-    if (m_tap_internal_key.IsNull() && !output.m_tap_internal_key.IsNull()) m_tap_internal_key = output.m_tap_internal_key;
+    if (m_tap_internal_key.IsNull() || !output.m_tap_internal_key.IsNull()) m_tap_internal_key = output.m_tap_internal_key;