diff --git a/CHANGELOG.md b/CHANGELOG.md
index 41241a336..eaa15507f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Harmonized the logger output: <symbol> (<dataSource>)
 - Improved the language localization for Dutch (`nl`)
 
 ### Fixed
diff --git a/apps/api/src/app/portfolio/portfolio-calculator.ts b/apps/api/src/app/portfolio/portfolio-calculator.ts
index cf6d1b156..c11e514e4 100644
--- a/apps/api/src/app/portfolio/portfolio-calculator.ts
+++ b/apps/api/src/app/portfolio/portfolio-calculator.ts
@@ -784,7 +784,7 @@ export class PortfolioCalculator {
         );
       } else if (!currentPosition.quantity.eq(0)) {
         Logger.warn(
-          `Missing historical market data for symbol ${currentPosition.symbol}`,
+          `Missing historical market data for ${currentPosition.symbol} (${currentPosition.dataSource})`,
           'PortfolioCalculator'
         );
         hasErrors = true;
diff --git a/apps/api/src/services/data-gathering/data-gathering.service.ts b/apps/api/src/services/data-gathering/data-gathering.service.ts
index 77b79835d..16ca505de 100644
--- a/apps/api/src/services/data-gathering/data-gathering.service.ts
+++ b/apps/api/src/services/data-gathering/data-gathering.service.ts
@@ -145,7 +145,9 @@ export class DataGatheringService {
           });
         } catch (error) {
           Logger.error(
-            `Failed to enhance data for symbol ${symbol} by ${dataEnhancer.getName()}`,
+            `Failed to enhance data for ${symbol} (${
+              assetProfile.dataSource
+            }) by ${dataEnhancer.getName()}`,
             error,
             'DataGatheringService'
           );