1 files changed, 1 insertions, 1 deletions
diff --git a/src/undo.h b/src/undo.h
index 6fc25b9853..9f39299fb6 100644
--- a/src/undo.h
+++ b/src/undo.h
@@ -25,7 +25,7 @@ class TxInUndoSerializer
 public:
     template<typename Stream>
     void Serialize(Stream &s) const {
-        ::Serialize(s, VARINT(txout->nHeight * 2 + (txout->fCoinBase ? 1 : 0), VarIntMode::NONNEGATIVE_SIGNED));
+        ::Serialize(s, VARINT(txout->nHeight * 2 + (txout->fCoinBase ? 1u : 0u)));
         if (txout->nHeight > 0) {
             // Required to maintain compatibility with older undo format.
             ::Serialize(s, (unsigned char)0);