diff --git a/library/roles/clamav/defaults/main.yml b/library/roles/clamav/defaults/main.yml
index c7723e43..ebd3f869 100644
--- a/library/roles/clamav/defaults/main.yml
+++ b/library/roles/clamav/defaults/main.yml
@@ -55,6 +55,9 @@ clamav_additional_signatures_proxy_host: ''
 clamav_additional_signatures_proxy_port: 3128
 clamav_additional_signatures_proxy_user: ''
 clamav_additional_signatures_proxy_pwd: ''
+clamav_additional_signatures_db_dir: '/var/lib/clamav-unofficial-sigs'
+clamav_additional_signatures_dbs_to_wipe:
+  - 'dbs-ss/scamnailer.ndb'
 
 # Freshclam
 clamav_freshclam_check_frequency: 12
diff --git a/library/roles/clamav/tasks/main.yml b/library/roles/clamav/tasks/main.yml
index 78c9b577..6f94e363 100644
--- a/library/roles/clamav/tasks/main.yml
+++ b/library/roles/clamav/tasks/main.yml
@@ -44,9 +44,17 @@
     with_items:
       - os.conf
       - user.conf
+  
+  - name: Wipe some unofficial signature files that are broken. Disabling them seems not enough
+    copy: content="" dest={{ clamav_additional_signatures_db_dir }}/{{ item }} force=yes
+    with_items: '{{ clamav_additional_signatures_dbs_to_wipe }}'
+    notify: Restart clamd
+
+  - name: Install a cron job that wipes the wrong signature files, just in case they reappear after an update
+    cron: name="Wipe some unofficial clamav signature dbs that are broken" user=root special_time=hourly job="{% for db in clamav_additional_signatures_dbs_to_wipe %}echo '' > {{ clamav_additional_signatures_db_dir }}/{{ db }}{% if not loop.last %}; {% endif %}{% endfor %}"
 
   when: clamav_unofficial_sigs_install | bool
-  tags: [ 'clamav', 'clamav_clamd', 'clamav_config' ]
+  tags: [ 'clamav', 'clamav_clamd', 'clamav_config', 'clamav_unofficial_sigs' ]
 
 - name: Configure clamav milter
   block: