# MutantHub mutant #3988: Custom mutation at validation.cpp:1488
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:1488-1488
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1488,1 +1488,1 @@
-        [](int64_t sum, auto& ws) { return sum + ws.m_vsize; });
+        [](uint32_t sum, auto& ws) { return sum + ws.m_vsize; });