diff --git a/packages/asset-swapper/CHANGELOG.json b/packages/asset-swapper/CHANGELOG.json
index 141a4707fb..fdca0f6f68 100644
--- a/packages/asset-swapper/CHANGELOG.json
+++ b/packages/asset-swapper/CHANGELOG.json
@@ -2,6 +2,10 @@
     {
         "version": "4.1.1",
         "changes": [
+            {
+                "note": "Fix bug with liquidity source breakdown",
+                "pr": 2472
+            },
             {
                 "note": "Prune orders before creating a dummy order for the Sampler",
                 "pr": 2470
diff --git a/packages/asset-swapper/src/utils/swap_quote_calculator.ts b/packages/asset-swapper/src/utils/swap_quote_calculator.ts
index 71ee57c55c..069897e43e 100644
--- a/packages/asset-swapper/src/utils/swap_quote_calculator.ts
+++ b/packages/asset-swapper/src/utils/swap_quote_calculator.ts
@@ -426,7 +426,9 @@ export class SwapQuoteCalculator {
             return {
                 ...acc,
                 ...{
-                    [source]: (!!acc[source] ? acc[source].plus(assetAmount) : assetAmount).dividedBy(totalAssetAmount),
+                    [source]: !!acc[source]
+                        ? acc[source].plus(assetAmount.dividedBy(totalAssetAmount))
+                        : assetAmount.dividedBy(totalAssetAmount),
                 },
             };
         }, breakdown);