diff --git a/openstack/datadog_checks/openstack/openstack.py b/openstack/datadog_checks/openstack/openstack.py
index 1d3e6aba52ff60..bbc1e7b2b7e2fa 100644
--- a/openstack/datadog_checks/openstack/openstack.py
+++ b/openstack/datadog_checks/openstack/openstack.py
@@ -853,7 +853,7 @@ def _is_valid_metric(label):
         if server_stats:
             tags = tags or []
             if project_name:
-                tags.append("project:{}".format(project_name))
+                tags.append("project_name:{}".format(project_name))
             if hypervisor_hostname:
                 tags.append("hypervisor:{0}".format(hypervisor_hostname))
             if server_name: