diff --git a/private/webui-wire-download.rkt b/private/webui-wire-download.rkt
index 034e99c..cc52441 100644
--- a/private/webui-wire-download.rkt
+++ b/private/webui-wire-download.rkt
@@ -58,7 +58,9 @@
     (let ((os (system-type 'os*)))
       (if (eq? os 'linux)
           (webui-wire-exists-linux?)
-          (error "Currently not implemented for other systems than Linux")
+          (error
+           (format
+            "Currently not implemented operating system '~a'" os))
           )
       )
     )