diff --git a/docs/CREDENTIALS.md b/docs/CREDENTIALS.md
index debe0a714f..04309a15fe 100644
--- a/docs/CREDENTIALS.md
+++ b/docs/CREDENTIALS.md
@@ -337,10 +337,8 @@ Various services shipped with `systemd` consume credentials for tweaking behavio
   to receive a notification via VSOCK when a virtual machine has finished booting.
   Note that in case the hypervisor does not support `SOCK_DGRAM` over `AF_VSOCK`,
   `SOCK_SEQPACKET` will be tried instead. The credential payload should be in the
-  form: `vsock:<CID>:<PORT>`, where `<CID>` is optional and if omitted will
-  default to talking to the hypervisor (`0`). Also note that this requires
-  support for VHOST to be built-in both the guest and the host kernels, and the
-  kernel modules to be loaded.
+  form: `vsock:<CID>:<PORT>`. Also note that this requires support for VHOST to be
+  built-in both the guest and the host kernels, and the kernel modules to be loaded.
 
 * [`systemd-sysusers(8)`](https://www.freedesktop.org/software/systemd/man/systemd-sysusers.html)
   will look for the credentials `passwd.hashed-password.<username>`,
diff --git a/man/systemd.system-credentials.xml b/man/systemd.system-credentials.xml
index 95a437adc4..a73aef9ed0 100644
--- a/man/systemd.system-credentials.xml
+++ b/man/systemd.system-credentials.xml
@@ -211,9 +211,7 @@
           Note that in case the hypervisor does not support <constant>SOCK_DGRAM</constant>
           over <constant>AF_VSOCK</constant>, <constant>SOCK_SEQPACKET</constant> will be
           tried instead. The credential payload for <constant>AF_VSOCK</constant> should be
-          in the form: <literal>vsock:CID:PORT</literal>, where <literal>CID</literal> is
-          optional and if omitted will default to talking to the hypervisor
-          (<constant>0</constant>).</para>
+          in the form: <literal>vsock:CID:PORT</literal>.</para>
         </listitem>
       </varlistentry>