diff --git a/src/Connected.Data/Storage/ReturnValueBinder.cs b/src/Connected.Data/Storage/ReturnValueBinder.cs
index 5797a19..78e35e5 100644
--- a/src/Connected.Data/Storage/ReturnValueBinder.cs
+++ b/src/Connected.Data/Storage/ReturnValueBinder.cs
@@ -77,7 +77,7 @@ namespace Connected.Data.Storage
 				if (property is null)
 					continue;
 
-				var existingValue = property.GetValue(operation);
+				var existingValue = property.GetValue(entity);
 				var overwriteAtt = property.FindAttribute<ReturnValueAttribute>();
 
 				if (overwriteAtt is null)