# MutantHub mutant #3818: Arithmetic operator mutation at blockstorage.cpp:383
# Repository: bitcoin/bitcoin @ 4fe28722a572793da7614734a0c9cc8e1adc751a
# File: src/node/blockstorage.cpp:383-383
# Review: APPROVED; outcome: SURVIVED
--- a/src/node/blockstorage.cpp
+++ b/src/node/blockstorage.cpp
@@ -383,1 +383,1 @@
-            nBytesToPrune = fileinfo.nSize + fileinfo.nUndoSize;
+            nBytesToPrune = fileinfo.nSize - fileinfo.nUndoSize;