# MutantHub mutant #4133: Return value mutation at validation.cpp:4426
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:4426-4426
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4426,1 +4426,1 @@
-        if (pindex->nChainWork < MinimumChainWork()) return true;
+        if (pindex->nChainWork < MinimumChainWork()) return false;