diff --git a/src/preserves/schemac.nim b/src/preserves/schemac.nim
index a7799f2..166df08 100644
--- a/src/preserves/schemac.nim
+++ b/src/preserves/schemac.nim
@@ -23,7 +23,7 @@ when isMainModule:
         write(outStream, schema.toPreserve)
 
       of "bundle":
-        var bundle: Bundle
+        let bundle = Bundle()
         if not dirExists inputPath:
           quit "not a directory of schemas: " & inputPath
         else: