diff --git a/api-ref/source/v2/floatingips.inc b/api-ref/source/v2/floatingips.inc
index a54c750ae..eda6b617c 100644
--- a/api-ref/source/v2/floatingips.inc
+++ b/api-ref/source/v2/floatingips.inc
@@ -174,6 +174,8 @@ reasons:
   - The internal OpenStack Networking port and fixed IP address are
     already associated with another floating IP.
 
+  - The external DNS service recordset quota exceeds the limit.
+
 Normal response codes: 201
 
 Error response codes: 400, 401, 404, 409