diff --git a/src/generator/modules/discovery/column.rs b/src/generator/modules/discovery/column.rs
index f4e5b68..c3482c7 100644
--- a/src/generator/modules/discovery/column.rs
+++ b/src/generator/modules/discovery/column.rs
@@ -62,7 +62,7 @@ impl Column {
             ColumnSpec::UniqueKey => Some("unique key".to_owned()),
             ColumnSpec::Check(_) => unimplemented!(),
             ColumnSpec::Generated { .. } => unimplemented!(),
-            ColumnSpec::Extra(_) => unimplemented!(),
+            ColumnSpec::Extra(e) => Some(e.to_string()),
             ColumnSpec::Comment(_) => unimplemented!(),
             ColumnSpec::Using(_) => unimplemented!(),
         }