diff --git a/roles/php_website/templates/fpm_site.conf.j2 b/roles/php_website/templates/fpm_site.conf.j2
index 6b9be0f2ed94218f2ff379f77f2b13e55061bbb2..aba20ebf478857f99ea8d814014f9b53924e428b 100644
--- a/roles/php_website/templates/fpm_site.conf.j2
+++ b/roles/php_website/templates/fpm_site.conf.j2
@@ -27,6 +27,6 @@ chdir = /
 ; to log errors in site-specific log file.
 catch_workers_output = yes
 
-{% for var, val in additional_fpm_config.items() %}
+{% for var, val in additional_fpm_config | dictsort %}
 {{ var }} = {{ val }}
 {% endfor %}