diff --git a/src/components/ReferendumCard/Referenda.utils.ts b/src/components/ReferendumCard/Referenda.utils.ts
index 546756be2..be0e7f351 100644
--- a/src/components/ReferendumCard/Referenda.utils.ts
+++ b/src/components/ReferendumCard/Referenda.utils.ts
@@ -29,12 +29,11 @@ export const useMinApprovalThreshold = (
 
   return useMemo(() => {
     if (track && blockNumber) {
-      const isDecidingSince =
-        referenda.deciding.unwrapOr(null)?.since.toString() ?? "0"
+      const decidingSince = referenda.deciding.unwrapOr(null)?.since.toString()
 
       const percentage = getDecidingEndPercentage(
         track.decisionPeriod.toString(),
-        isDecidingSince.toString(),
+        decidingSince,
         blockNumber,
       )
 
@@ -94,12 +93,11 @@ export const useSupportThreshold = (
 
   const supportThreshold = useMemo(() => {
     if (track && blockNumber) {
-      const isDecidingSince =
-        referenda.deciding.unwrapOr(null)?.since.toString() ?? "0"
+      const decidingSince = referenda.deciding.unwrapOr(null)?.since.toString()
 
       const percentage = getDecidingEndPercentage(
         track.decisionPeriod.toString(),
-        isDecidingSince.toString(),
+        decidingSince,
         blockNumber,
       )
 
diff --git a/src/utils/opengov.ts b/src/utils/opengov.ts
index 242185ebe..e75ad6aa3 100644
--- a/src/utils/opengov.ts
+++ b/src/utils/opengov.ts
@@ -1,5 +1,6 @@
 import BigNumber from "bignumber.js"
 import { TReferenda } from "api/democracy"
+import { BN_0 } from "./constants"
 
 export const getCurveData = (
   track: TReferenda,
@@ -73,9 +74,11 @@ export const makeLinearCurve = (
 
 export const getDecidingEndPercentage = (
   decisionPeriod: string,
-  decidingSince: string,
+  decidingSince: string | undefined,
   endHeight: string,
 ) => {
+  if (decidingSince === undefined) return BN_0
+
   const gone = BigNumber(endHeight).minus(decidingSince)
 
   return BigNumber.min(gone.div(decisionPeriod), 1)