diff --git a/NEWS.rst b/NEWS.rst
index 80f8bfb5e38d5851537b43bf9c4138f4c01ebf69_TkVXUy5yc3Q=..a67c24d377d3868ecafb4dd311338dc98dd9c7e0_TkVXUy5yc3Q= 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -2,6 +2,11 @@
 History
 =======
 
+16.5.1
+------
+
+Avoid trying to set db_host with an empty value.
+
 16.5.0
 ------
 
diff --git a/odoo_scripts/docker_dev_start.py b/odoo_scripts/docker_dev_start.py
index 80f8bfb5e38d5851537b43bf9c4138f4c01ebf69_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk=..a67c24d377d3868ecafb4dd311338dc98dd9c7e0_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk= 100755
--- a/odoo_scripts/docker_dev_start.py
+++ b/odoo_scripts/docker_dev_start.py
@@ -766,8 +766,8 @@
                 _logger.info("You can add the --create-user argument to create it")
                 return 16
 
-    arg.append("--db_host")
-    arg.append(db_host)
+        arg.append("--db_host")
+        arg.append(db_host)
 
     # --- restore ---
     # TODO find out why odoo_help would stop us from restoring