diff --git a/plugins/modules/mysql_user.py b/plugins/modules/mysql_user.py
index 78f11a9..cf210a3 100644
--- a/plugins/modules/mysql_user.py
+++ b/plugins/modules/mysql_user.py
@@ -46,6 +46,7 @@ options:
   priv:
     description:
       - "MySQL privileges string in the format: C(db.table:priv1,priv2)."
+      - Additionally, there must be no spaces between the table and the privilege as this will yield a non-idempotent check mode.
       - "Multiple privileges can be specified by separating each one using
         a forward slash: C(db.table1:priv/db.table2:priv)."
       - The format is based on MySQL C(GRANT) statement.