diff --git a/services/ui-src/src/shared/types/MeasureTemplate.tsx b/services/ui-src/src/shared/types/MeasureTemplate.tsx
index 45914761a..fe382139b 100644
--- a/services/ui-src/src/shared/types/MeasureTemplate.tsx
+++ b/services/ui-src/src/shared/types/MeasureTemplate.tsx
@@ -16,6 +16,7 @@ export interface customData {
   rateCalc?: RateFormula;
   customPrompt?: string;
   RateComponent?: RateComp;
+  populationSampleSize?: string;
 }
 
 export interface MeasureTemplateData {