diff --git a/ts/lik.interestmap.interest.ts b/ts/lik.interestmap.interest.ts
index aec2ff2..33b34b7 100644
--- a/ts/lik.interestmap.interest.ts
+++ b/ts/lik.interestmap.interest.ts
@@ -2,7 +2,13 @@ import * as plugins from './lik.plugins';
 
 import { InterestMap, IInterestComparisonFunc } from './lik.interestmap';
 
+export interface IInterestOptions {
+  markLostAfterDefault: number;
+}
+
 export class Interest<DTInterestId, DTInterestFullfillment> {
+  public options: IInterestOptions;
+
   private interestMapRef: InterestMap<DTInterestId, DTInterestFullfillment>;
   public originalInterest: DTInterestId;
   public comparisonFunc: IInterestComparisonFunc<DTInterestId>;
@@ -41,14 +47,20 @@ export class Interest<DTInterestId, DTInterestFullfillment> {
   constructor(
     interestMapArg: InterestMap<DTInterestId, DTInterestFullfillment>,
     interestArg: DTInterestId,
-    comparisonFuncArg: IInterestComparisonFunc<DTInterestId>
+    comparisonFuncArg: IInterestComparisonFunc<DTInterestId>,
+    optionsArg?: IInterestOptions
   ) {
+    this.interestMapRef = interestMapArg;
     this.originalInterest = interestArg;
     this.comparisonFunc = comparisonFuncArg;
-    this.interestMapRef = interestMapArg;
+    this.options = optionsArg;
+
     this.destructionTimer.completed.then(() => {
       this.destroy();
     });
+    if (this.options?.markLostAfterDefault) {
+      plugins.smartdelay.delayFor(this.options.markLostAfterDefault).then(this.markLost);
+    }
   }
 
   // ===============================
diff --git a/ts/lik.interestmap.ts b/ts/lik.interestmap.ts
index a4462a7..cde243c 100644
--- a/ts/lik.interestmap.ts
+++ b/ts/lik.interestmap.ts
@@ -7,7 +7,13 @@ import { Interest } from './lik.interestmap.interest';
 
 export type IInterestComparisonFunc<T> = (objectArg: T) => string;
 
+export interface IInterestMapOptions {
+  markLostAfterDefault?: number;
+}
+
 export class InterestMap<DTInterestId, DTInterestFullfillment> {
+  public options: IInterestMapOptions;
+
   /**
    * stores interests that are currently fullfilled by the cache
    */
@@ -18,8 +24,9 @@ export class InterestMap<DTInterestId, DTInterestFullfillment> {
    */
   private comparisonFunc: IInterestComparisonFunc<DTInterestId>;
 
-  constructor(comparisonFuncArg: IInterestComparisonFunc<DTInterestId>) {
+  constructor(comparisonFuncArg: IInterestComparisonFunc<DTInterestId>, optionsArg: IInterestMapOptions = {}) {
     this.comparisonFunc = comparisonFuncArg;
+    this.options = optionsArg;
   }
 
   /**
@@ -34,7 +41,10 @@ export class InterestMap<DTInterestId, DTInterestFullfillment> {
     const newInterest = new Interest<DTInterestId, DTInterestFullfillment>(
       this,
       objectArg,
-      this.comparisonFunc
+      this.comparisonFunc,
+      {
+        markLostAfterDefault: this.options.markLostAfterDefault
+      }
     );
     let interestExists = false;
     await this.interestObjectMap.forEach((interestArg) => {