diff --git a/modules/installation-creating-mirror-registry.adoc b/modules/installation-creating-mirror-registry.adoc
index 05f1028c00..692fa8accf 100644
--- a/modules/installation-creating-mirror-registry.adoc
+++ b/modules/installation-creating-mirror-registry.adoc
@@ -101,6 +101,7 @@ OpenSSL documentation.
      -v /opt/registry/certs:/certs:z \
      -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt \
      -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key \
+     -e REGISTRY_COMPATIBILITY_SCHEMA1_ENABLED=true \
      -d docker.io/library/registry:2
 ----
 <1> For `<local_registry_host_port>`, specify the port that your mirror registry
diff --git a/modules/ipi-install-creating-a-disconnected-registry.adoc b/modules/ipi-install-creating-a-disconnected-registry.adoc
index c64c690d93..1a992e1657 100644
--- a/modules/ipi-install-creating-a-disconnected-registry.adoc
+++ b/modules/ipi-install-creating-a-disconnected-registry.adoc
@@ -112,6 +112,7 @@ Replace `<user>` with the user name and `<passwd>` with the password.
   -e "REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd" \
   -e "REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt" \
   -e "REGISTRY_HTTP_TLS_KEY=/certs/domain.key" \
+  -e "REGISTRY_COMPATIBILITY_SCHEMA1_ENABLED=true" \
   -v /opt/registry/data:/var/lib/registry:z \
   -v /opt/registry/auth:/auth:z \
   -v /opt/registry/certs:/certs:z \