diff --git a/guix-data-service/jobs.scm b/guix-data-service/jobs.scm
index 7e7a533..31440ba 100644
--- a/guix-data-service/jobs.scm
+++ b/guix-data-service/jobs.scm
@@ -18,6 +18,7 @@
 (define-module (guix-data-service jobs)
   #:use-module (ice-9 match)
   #:use-module (ice-9 format)
+  #:use-module (ice-9 threads)
   #:use-module (guix-data-service jobs load-new-guix-revision)
   #:export (process-jobs
 
diff --git a/guix-data-service/jobs/load-new-guix-revision.scm b/guix-data-service/jobs/load-new-guix-revision.scm
index da58602..7b54c66 100644
--- a/guix-data-service/jobs/load-new-guix-revision.scm
+++ b/guix-data-service/jobs/load-new-guix-revision.scm
@@ -18,6 +18,7 @@
 (define-module (guix-data-service jobs load-new-guix-revision)
   #:use-module (srfi srfi-1)
   #:use-module (ice-9 match)
+  #:use-module (ice-9 threads)
   #:use-module (ice-9 textual-ports)
   #:use-module (ice-9 hash-table)
   #:use-module (rnrs exceptions)