diff --git a/ui/types/api/slider.d.ts b/ui/types/api/slider.d.ts
index 0c1c5308a5b..8df9ebbb0ae 100644
--- a/ui/types/api/slider.d.ts
+++ b/ui/types/api/slider.d.ts
@@ -26,7 +26,8 @@ interface SliderMarkerLabelObjectDefinition {
 
 export type SliderMarkerLabels =
   | boolean
-  | Array<SliderMarkerLabelDefinitionRequiredValue>
+  // using a number is shorthand for { value: number }
+  | (SliderMarkerLabelDefinitionRequiredValue | number)[]
   | SliderMarkerLabelObjectDefinition
   | ((value: number) => string | SliderMarkerLabelDefinition);