diff --git a/core/siren-env.el b/core/siren-env.el
index 106f558..8acdd7b 100644
--- a/core/siren-env.el
+++ b/core/siren-env.el
@@ -8,7 +8,7 @@
 ;;; Code:
 
 (require 'exec-path-from-shell)
-(when (memq window-system '(mac ns))
+(when (memq window-system '(mac ns x))
   (exec-path-from-shell-initialize))
 
 (provide 'siren-env)