diff --git a/gnu/services/vpn.scm b/gnu/services/vpn.scm
index def381987b..7b3bb8903c 100644
--- a/gnu/services/vpn.scm
+++ b/gnu/services/vpn.scm
@@ -833,7 +833,7 @@ (define (peer->config peer)
 
 (define (wireguard-activation config)
   (match-record config <wireguard-configuration>
-    (private-key)
+    (private-key wireguard)
     #~(begin
         (use-modules (guix build utils)
                      (ice-9 popen)
@@ -842,7 +842,7 @@ (define (wireguard-activation config)
         (unless (file-exists? #$private-key)
           (let* ((pipe
                   (open-input-pipe (string-append
-                                    #$(file-append wireguard-tools "/bin/wg")
+                                    #$(file-append wireguard "/bin/wg")
                                     " genkey")))
                  (key (read-line pipe)))
             (call-with-output-file #$private-key