diff --git a/lisp/doom-modules.el b/lisp/doom-modules.el
index 9f683e811..3f224c7e6 100644
--- a/lisp/doom-modules.el
+++ b/lisp/doom-modules.el
@@ -184,6 +184,7 @@ cell."
 
 (defun doom-module->context (key)
   "Change a `doom-module' into a `doom-module-context'."
+  (declare (side-effect-free t))
   (pcase-let
       (((doom-module index path flags group name)
         (if (doom-module-p key)