diff --git a/docs/variable.rst b/docs/variable.rst
index a79bfe7ce..11e6f0f1f 100644
--- a/docs/variable.rst
+++ b/docs/variable.rst
@@ -123,6 +123,12 @@ Parameters
      - The value of the variable is a list.
 
        **Default value**: `false`
+
+       **Parameters**:
+
+       - multi_length: number of expected values for a multiple variable
+       - multi_min_length: maximum number of expected values for a multiple variable
+       - multi_max_length: minimum number of expected values for a minimum variable
    * - **unique**
 
        `boolean`