# MutantHub mutant #503: Logical operator mutation at psbt.cpp:554
# Repository: bitcoin/bitcoin @ 2f72123f613f3aa1484ed06344039be78dedcb33
# File: src/psbt.cpp:554-554
# Review: APPROVED; outcome: SURVIVED
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -554,1 +554,1 @@
-    return !input.final_script_sig.empty() || !input.final_script_witness.IsNull();
+    return !input.final_script_sig.empty() && !input.final_script_witness.IsNull();