diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index a57280d..d0be48d 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -23,6 +23,10 @@
   register: add_repository_key
   ignore_errors: true
 
+- name: Ensure curl is present (on older systems without SNI).
+  package: name=curl state=present
+  when: add_repository_key|failed
+
 - name: Add Docker apt key (alternative for older systems without SNI).
   shell: "curl -sSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -"
   args: