diff --git a/linux/system/repo.sls b/linux/system/repo.sls
index 73bb33d..d8794d8 100644
--- a/linux/system/repo.sls
+++ b/linux/system/repo.sls
@@ -85,6 +85,7 @@
         {% set repo_key = salt['hashutil.base64_b64encode'](repo.key) %}
   cmd.run:
     - name: "echo '{{ repo_key }}' | base64 -d | apt-key add -"
+    - unless: "apt-key finger | grep -q \"$(echo '{{ repo_key }}' | base64 -d | gpg --with-fingerprint -o - | grep -wi 'fingerprint')\""
     - require_in:
         {%- if repo.get('default', False) %}
       - file: default_repo_list