diff --git a/tasks/install.yml b/tasks/install.yml
index 0755d68..83bc1c2 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -45,7 +45,7 @@
         content: "{{ matrix_signing_key }}"
         dest: "{{ matrix_conf_dir }}/{{ matrix_server_url }}.signing.key"
         mode: 0600
-      whem: matrix_signing_key is defined
+      when: matrix_signing_key is defined
 
     - name: Create new signing key if not provided
       shell: '{{ matrix_base_dir }}/env/bin/python -c "from signedjson import key; file = open(''{{ matrix_conf_dir }}/{{ matrix_server_url }}.signing.key'',''w''); key.write_signing_keys(file, [key.generate_signing_key(''first'')]); file.close()"'