diff --git a/components/style/values/generics/column.rs b/components/style/values/generics/column.rs
index 212eb28b110..f0a0830078d 100644
--- a/components/style/values/generics/column.rs
+++ b/components/style/values/generics/column.rs
@@ -11,6 +11,7 @@ pub enum ColumnCount<PositiveInteger> {
     /// A positive integer.
     Integer(PositiveInteger),
     /// The keyword `auto`.
+    #[animation(error)]
     Auto,
 }