diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f444784..3ef10e66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ The **patch** part changes incrementally at each release.
 * redis: max clients is configurable
 * generate-ldif: support MariaDB 10.3
 * mysql: activate binary logs by specifying log_bin path
+* mysql: specify a custom server_id
 
 ### Changed
 * elasticsearch: listen on local interface only by default
diff --git a/mysql/README.md b/mysql/README.md
index 90025175..ff4fcbe9 100644
--- a/mysql/README.md
+++ b/mysql/README.md
@@ -31,6 +31,7 @@ Tasks are extracted in several files, included in `tasks/main.yml` :
 * `mysql_query_cache_limit`: (default: `Null`, default evolinux config is then used) ;
 * `mysql_query_cache_size`: (default: `Null`, default evolinux config is then used) ;
 * `mysql_log_bin`: (default: `Null`, activates binlogs if used) ;
+* `mysql_server_id`: (default: `Null`, MySQL version default is then used) ;
 * `mysql_custom_datadir`: custom datadir.
 * `mysql_custom_tmpdir`: custom tmpdir.
 * `general_alert_email`: email address to send various alert messages (default: `root@localhost`).
diff --git a/mysql/defaults/main.yml b/mysql/defaults/main.yml
index cd0dec38..633619cf 100644
--- a/mysql/defaults/main.yml
+++ b/mysql/defaults/main.yml
@@ -30,6 +30,7 @@ mysql_max_heap_table_size: Null
 mysql_query_cache_limit: Null
 mysql_query_cache_size: Null
 mysql_log_bin: Null
+mysql_server_id: Null
 
 mysql_cron_optimize: True
 mysql_cron_optimize_frequency: weekly
diff --git a/mysql/templates/evolinux-custom.cnf.j2 b/mysql/templates/evolinux-custom.cnf.j2
index 044427bf..f8ee104e 100644
--- a/mysql/templates/evolinux-custom.cnf.j2
+++ b/mysql/templates/evolinux-custom.cnf.j2
@@ -32,3 +32,6 @@ query_cache_size = {{ mysql_query_cache_size }}
 {% if mysql_log_bin %}
 log_bin = {{ mysql_log_bin }}
 {% endif %}
+{% if mysql_server_id %}
+server_id = {{ mysql_server_id }}
+{% endif %}