diff --git a/README.md b/README.md
index edb3336..22451cc 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,7 @@ $ git clone https://github.com/borgbase/ansible-role-borgbackup.git roles/ansibl
 - `borgmatic_hooks`: Hooks to monitor your backups e.g. with [Healthchecks](https://healthchecks.io/). See [official documentation](https://torsion.org/borgmatic/docs/how-to/monitor-your-backups/) for more.
 - `borgmatic_timer`: If the variable is set, a timer is installed. A choice must be made between `cron` and `systemd`.
 - `borgmatic_relocated_repo_access_is_ok`: Bypass Borg error about a repository that has been moved. Defaults to `false`
+- `borgmatic_unknown_unencrypted_repo_access_is_ok`: Bypass Borg error about a previously unknown unencrypted repository. Defaults to `false`
 - `borgmatic_store_atime`: Store atime into archive. Defaults to `true`
 - `borgmatic_store_ctime`: Store ctime into archive. Defaults to `true`
 - `borgmatic_version`: Force a specific borgmatic version to be installed
diff --git a/defaults/main.yml b/defaults/main.yml
index b3e5872..ad45b45 100755
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -43,6 +43,7 @@ borgmatic_check_last: 3
 borgmatic_store_atime: true
 borgmatic_store_ctime: true
 borgmatic_relocated_repo_access_is_ok: false
+borgmatic_unknown_unencrypted_repo_access_is_ok: false
 borgmatic_version: ">=1.7.11"
 
 borg_venv_path: "/opt/borgmatic"
diff --git a/meta/argument_specs.yml b/meta/argument_specs.yml
index 11265c9..d327939 100644
--- a/meta/argument_specs.yml
+++ b/meta/argument_specs.yml
@@ -114,6 +114,9 @@ argument_specs:
       borgmatic_relocated_repo_access_is_ok:
         type: bool
         description: Bypass Borg error about a repository that has been moved.
+      borgmatic_unknown_unencrypted_repo_access_is_ok:
+        type: bool
+        description: Bypass Borg error about a previously unknown unencrypted repository.
       borg_retention_policy:
         keep_secondly:
           type: int
diff --git a/templates/config.yaml.j2 b/templates/config.yaml.j2
index 86456c2..8f7e82d 100644
--- a/templates/config.yaml.j2
+++ b/templates/config.yaml.j2
@@ -112,6 +112,9 @@ storage:
     # Bypass Borg error about a repository that has been moved.
     relocated_repo_access_is_ok: {{ borgmatic_relocated_repo_access_is_ok }}
 
+    # Bypass Borg error about a previously unknown unencrypted repository.
+    unknown_unencrypted_repo_access_is_ok: {{ borgmatic_unknown_unencrypted_repo_access_is_ok }}
+
 # Retention policy for how many backups to keep in each category. See
 # https://borgbackup.readthedocs.org/en/stable/usage.html#borg-prune for details.
 # At least one of the "keep" options is required for pruning to work.