diff --git a/mangowm.scm b/mangowm.scm
index e2b0287a..a18d0a71 100644
--- a/mangowm.scm
+++ b/mangowm.scm
@@ -5,6 +5,7 @@
   #:use-module (guix packages)
   #:use-module (guix utils)
   #:use-module (gnu packages wm)
+  #:use-module (gnu packages gtk)
   #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages xdisorg)
   #:use-module (gnu packages pciutils)