diff --git a/doc/epp/domain.md b/doc/epp/domain.md
index 8e3b4e63a..8a4383554 100644
--- a/doc/epp/domain.md
+++ b/doc/epp/domain.md
@@ -7,7 +7,7 @@
 | `<create>`          | 1     |      |
 | - `<domain:create>` | 1     | Must have attribute xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"      |
 | - - `<domain:name>` | 1     | Domain name. Can contain unicode characters. |
-| - - `<domain:period unit="(y/m/d)">` | 0-1     | Registration period for domain. Must add up to 1 / 2 / 3 years. |
+| - - `<domain:period>` | 0-1     | Registration period for domain. Must add up to 1 / 2 / 3 years. Attribute: unit="y/m/d"|
 
 
 ##### create