diff --git a/system/servers/ci.scm b/system/servers/ci.scm
index 7469bd1..2b17e97 100644
--- a/system/servers/ci.scm
+++ b/system/servers/ci.scm
@@ -3,6 +3,7 @@
   #:use-module (gnu packages ci)
   #:use-module (gnu services cuirass)
   #:use-module (system base-system)
+  #:use-module (guix gexp)
   #:export (ci-operating-system))
 
 (define ci-operating-system