diff --git a/docs/en/reference/annotations-reference.rst b/docs/en/reference/annotations-reference.rst
index 8a2487a65..0ff926144 100644
--- a/docs/en/reference/annotations-reference.rst
+++ b/docs/en/reference/annotations-reference.rst
@@ -113,7 +113,7 @@ Optional attributes:
 -  **unique**: Boolean value to determine if the value of the column
    should be unique across all rows of the underlying entities table.
 
--  **nullable**: Determines if NULL values allowed for this column.
+-  **nullable**: Determines if NULL values allowed for this column. If not specified, default value is false.
 
 -  **options**: Array of additional options: