diff --git a/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts b/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
index ff4cb64b11..80968ebd12 100644
--- a/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
+++ b/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
@@ -1,4 +1,5 @@
 import { CurrentRateService } from '@ghostfolio/api/app/portfolio/current-rate.service';
+import { PortfolioCalculatorPosition } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-calculator-position.interface';
 import { PortfolioOrder } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-order.interface';
 import { PortfolioSnapshotValue } from '@ghostfolio/api/app/portfolio/interfaces/snapshot-value.interface';
 import { TransactionPointSymbol } from '@ghostfolio/api/app/portfolio/interfaces/transaction-point-symbol.interface';
@@ -34,7 +35,7 @@ import {
   ResponseError,
   SymbolMetrics
 } from '@ghostfolio/common/interfaces';
-import { PortfolioSnapshot, TimelinePosition } from '@ghostfolio/common/models';
+import { PortfolioSnapshot } from '@ghostfolio/common/models';
 import { GroupBy } from '@ghostfolio/common/types';
 import { PerformanceCalculationType } from '@ghostfolio/common/types/performance-calculation-type.type';
 
@@ -176,7 +177,7 @@ export abstract class PortfolioCalculator {
   }
 
   protected abstract calculateOverallPerformance(
-    positions: (TimelinePosition & { includeInPerformance: boolean })[]
+    positions: PortfolioCalculatorPosition[]
   ): PortfolioSnapshot;
 
   @LogPerformance
@@ -312,10 +313,7 @@ export abstract class PortfolioCalculator {
     const errors: ResponseError['errors'] = [];
     let hasAnySymbolMetricsErrors = false;
 
-    const positions: (TimelinePosition & {
-      includeInHoldings: boolean;
-      includeInPerformance: boolean;
-    })[] = [];
+    const positions: PortfolioCalculatorPosition[] = [];
 
     const accumulatedValuesByDate: {
       [date: string]: {
diff --git a/apps/api/src/app/portfolio/calculator/roai/portfolio-calculator.ts b/apps/api/src/app/portfolio/calculator/roai/portfolio-calculator.ts
index 1c6cb979cc..9a87af153c 100644
--- a/apps/api/src/app/portfolio/calculator/roai/portfolio-calculator.ts
+++ b/apps/api/src/app/portfolio/calculator/roai/portfolio-calculator.ts
@@ -1,4 +1,5 @@
 import { PortfolioCalculator } from '@ghostfolio/api/app/portfolio/calculator/portfolio-calculator';
+import { PortfolioCalculatorPosition } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-calculator-position.interface';
 import { PortfolioOrderItem } from '@ghostfolio/api/app/portfolio/interfaces/portfolio-order-item.interface';
 import { getFactor } from '@ghostfolio/api/helper/portfolio.helper';
 import { getIntervalFromDateRange } from '@ghostfolio/common/calculation-helper';
@@ -7,7 +8,7 @@ import {
   AssetProfileIdentifier,
   SymbolMetrics
 } from '@ghostfolio/common/interfaces';
-import { PortfolioSnapshot, TimelinePosition } from '@ghostfolio/common/models';
+import { PortfolioSnapshot } from '@ghostfolio/common/models';
 import { DateRange } from '@ghostfolio/common/types';
 import { PerformanceCalculationType } from '@ghostfolio/common/types/performance-calculation-type.type';
 
@@ -26,7 +27,7 @@ export class RoaiPortfolioCalculator extends PortfolioCalculator {
   private chartDates: string[];
 
   protected calculateOverallPerformance(
-    positions: (TimelinePosition & { includeInPerformance: boolean })[]
+    positions: PortfolioCalculatorPosition[]
   ): PortfolioSnapshot {
     let currentValueInBaseCurrency = new Big(0);
     let grossPerformance = new Big(0);
diff --git a/apps/api/src/app/portfolio/interfaces/portfolio-calculator-position.interface.ts b/apps/api/src/app/portfolio/interfaces/portfolio-calculator-position.interface.ts
new file mode 100644
index 0000000000..f0cf8a7742
--- /dev/null
+++ b/apps/api/src/app/portfolio/interfaces/portfolio-calculator-position.interface.ts
@@ -0,0 +1,6 @@
+import { TimelinePosition } from '@ghostfolio/common/models';
+
+export interface PortfolioCalculatorPosition extends TimelinePosition {
+  includeInHoldings: boolean;
+  includeInPerformance: boolean;
+}