diff --git a/src/mappings/veDelegation.ts b/src/mappings/veDelegation.ts
index b4ea890..2ffba08 100644
--- a/src/mappings/veDelegation.ts
+++ b/src/mappings/veDelegation.ts
@@ -71,5 +71,6 @@ export function handleBurnBoost(event: BurnBoost): void {
 
   // delete
   const veDelegation = getveDelegation(_tokenId.toHex())
+  veDelegation.amountFraction = BigInt.zero()
   veDelegation.amount = BigInt.zero()
 }