diff --git a/packages/kbn-alerts-ui-shared/src/alert_filter_controls/constants.ts b/packages/kbn-alerts-ui-shared/src/alert_filter_controls/constants.ts
index 95606e276362b..c72808d5fceab 100644
--- a/packages/kbn-alerts-ui-shared/src/alert_filter_controls/constants.ts
+++ b/packages/kbn-alerts-ui-shared/src/alert_filter_controls/constants.ts
@@ -70,6 +70,7 @@ export const COMMON_OPTIONS_LIST_CONTROL_INPUTS: Partial<OptionsListControlState
   hideSort: true,
   placeholder: '',
   width: 'small',
+  grow: true,
 };
 
 export const TIMEOUTS = {