diff --git a/guix/store.scm b/guix/store.scm
index 2563d26fa0..00d1e26fc4 100644
--- a/guix/store.scm
+++ b/guix/store.scm
@@ -40,6 +40,7 @@
   #:use-module (ice-9 regex)
   #:use-module (ice-9 vlist)
   #:use-module (ice-9 popen)
+  #:use-module (ice-9 threads)
   #:use-module (web uri)
   #:export (%daemon-socket-uri
             %gc-roots-directory