diff --git a/lib/charms/mysql/v0/mysql.py b/lib/charms/mysql/v0/mysql.py
index 04697a107..67c754960 100644
--- a/lib/charms/mysql/v0/mysql.py
+++ b/lib/charms/mysql/v0/mysql.py
@@ -1006,6 +1006,7 @@ def render_mysqld_configuration(  # noqa: C901
             "general_log": "ON",
             "general_log_file": f"{snap_common}/var/log/mysql/general.log",
             "slow_query_log_file": f"{snap_common}/var/log/mysql/slowquery.log",
+            "loose-group_replication_paxos_single_leader": "ON",
             "binlog_expire_logs_seconds": f"{binlog_retention_seconds}",
             "loose-audit_log_policy": "LOGINS",
             "loose-audit_log_file": f"{snap_common}/var/log/mysql/audit.log",
diff --git a/tests/unit/test_mysql.py b/tests/unit/test_mysql.py
index 7b51fa467..c601057be 100644
--- a/tests/unit/test_mysql.py
+++ b/tests/unit/test_mysql.py
@@ -1833,6 +1833,7 @@ def test_render_mysqld_configuration(self, _get_available_memory):
             "loose-audit_log_policy": "LOGINS",
             "loose-audit_log_strategy": "ASYNCHRONOUS",
             "loose-audit_log_file": "/var/log/mysql/audit.log",
+            "loose-group_replication_paxos_single_leader": "ON",
             "innodb_buffer_pool_chunk_size": "2902458368",
         }
         self.maxDiff = None
diff --git a/tests/unit/test_mysqlsh_helpers.py b/tests/unit/test_mysqlsh_helpers.py
index 3d030e37d..c52c64de8 100644
--- a/tests/unit/test_mysqlsh_helpers.py
+++ b/tests/unit/test_mysqlsh_helpers.py
@@ -292,6 +292,7 @@ def test_write_mysqld_config(
             "general_log = ON",
             "general_log_file = /var/snap/charmed-mysql/common/var/log/mysql/general.log",
             "slow_query_log_file = /var/snap/charmed-mysql/common/var/log/mysql/slowquery.log",
+            "loose-group_replication_paxos_single_leader = ON",
             "binlog_expire_logs_seconds = 604800",
             "loose-audit_log_policy = LOGINS",
             "loose-audit_log_file = /var/snap/charmed-mysql/common/var/log/mysql/audit.log",
@@ -335,6 +336,7 @@ def test_write_mysqld_config(
             "general_log = ON",
             "general_log_file = /var/snap/charmed-mysql/common/var/log/mysql/general.log",
             "slow_query_log_file = /var/snap/charmed-mysql/common/var/log/mysql/slowquery.log",
+            "loose-group_replication_paxos_single_leader = ON",
             "binlog_expire_logs_seconds = 604800",
             "loose-audit_log_policy = LOGINS",
             "loose-audit_log_file = /var/snap/charmed-mysql/common/var/log/mysql/audit.log",