diff --git a/libs/common/src/lib/interfaces/asset-profile-identifier.interface.ts b/libs/common/src/lib/interfaces/asset-profile-identifier.interface.ts
index 48fc18c2f..cd14bb1dc 100644
--- a/libs/common/src/lib/interfaces/asset-profile-identifier.interface.ts
+++ b/libs/common/src/lib/interfaces/asset-profile-identifier.interface.ts
@@ -1,6 +1,6 @@
 import { DataSource } from '@prisma/client';
 
 export interface AssetProfileIdentifier {
-  dataSource: DataSource;
+  dataSource?: DataSource;
   symbol: string;
 }
diff --git a/libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts b/libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts
index 4021bf97f..e6f2d37b2 100644
--- a/libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts
+++ b/libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts
@@ -357,12 +357,9 @@ export class GfPortfolioProportionChartComponent
               try {
                 const dataIndex = activeElements[0].index;
                 const symbol = chart.data.labels?.[dataIndex] as string;
+                const dataSource = this.data[symbol]?.dataSource;
 
-                const dataSource = this.data[symbol].dataSource;
-
-                if (dataSource) {
-                  this.proportionChartClicked.emit({ dataSource, symbol });
-                }
+                this.proportionChartClicked.emit({ dataSource, symbol });
               } catch {}
             },
             onHover: (event, chartElement) => {