diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
index 27f33409ae1a5..a72746f729ad5 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
@@ -64,6 +64,7 @@ export const StackByComboBox: React.FC<StackedBySelectProps> = ({ selected, onSe
         placeholder={i18n.STACK_BY_PLACEHOLDER}
         prepend={i18n.STACK_BY_LABEL}
         singleSelection={singleSelection}
+        isClearable={false}
         sortMatchesBy="startsWith"
         options={stackOptions}
         selectedOptions={selectedOptions}