diff --git a/guix-data-service/jobs/load-new-guix-revision.scm b/guix-data-service/jobs/load-new-guix-revision.scm
index 844be4f..a925ee2 100644
--- a/guix-data-service/jobs/load-new-guix-revision.scm
+++ b/guix-data-service/jobs/load-new-guix-revision.scm
@@ -1787,7 +1787,7 @@ SELECT 1 FROM derivation_source_file_nars WHERE derivation_source_file_id = $1"
 
   (define (call-with-inferior proc)
     (define (check-wal-size)
-      (define threshold (* 256 (expt 2 20)))
+      (define threshold (* 4096 (expt 2 20)))
 
       (define (get-wal-bytes)
         (catch #t