diff --git a/log/handler.go b/log/handler.go
index 3f7027fc74..655e33c114 100644
--- a/log/handler.go
+++ b/log/handler.go
@@ -277,13 +277,13 @@ func builtinReplace(_ []string, attr slog.Attr) slog.Attr {
 		if v == nil {
 			attr.Value = slog.AnyValue("<nil>")
 		} else {
-			attr.Value = slog.AnyValue(formatLogfmtBigInt(v))
+			attr.Value = slog.AnyValue(v.String())
 		}
 	case *uint256.Int:
 		if v == nil {
 			attr.Value = slog.AnyValue("<nil>")
 		} else {
-			attr.Value = slog.AnyValue(formatLogfmtUint256(v))
+			attr.Value = slog.AnyValue(v.ToBig().String())
 		}
 	}
 	return attr