diff --git a/src/data/data1d/Spectrum1D/SumManager.ts b/src/data/data1d/Spectrum1D/SumManager.ts
index 197b19e14..62636baaf 100644
--- a/src/data/data1d/Spectrum1D/SumManager.ts
+++ b/src/data/data1d/Spectrum1D/SumManager.ts
@@ -46,7 +46,7 @@ export function initSumOptions(
 }
 
 export function getSum(mf: string | null | undefined, nucleus: string) {
-  const defaultSum = 100;
+  const defaultSum = 1;
 
   if (!mf || !nucleus) return defaultSum;