diff --git a/msbuild/Xamarin.Shared/Xamarin.Shared.targets b/msbuild/Xamarin.Shared/Xamarin.Shared.targets
index 899885b76029..010fa4714938 100644
--- a/msbuild/Xamarin.Shared/Xamarin.Shared.targets
+++ b/msbuild/Xamarin.Shared/Xamarin.Shared.targets
@@ -951,7 +951,7 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 			NoSymbolStrip="$(_NoSymbolStrip)"
 			NoDSymUtil="$(_NoDSymUtil)"
 			>
-			<Output TaskParameter="CustomBundleName" ItemName="_CustomBundleName" />
+			<Output TaskParameter="CustomBundleName" PropertyName="_CustomBundleName" />
 			<Output TaskParameter="EnvironmentVariables" ItemName="_BundlerEnvironmentVariables" />
 			<Output TaskParameter="MarshalManagedExceptionMode" PropertyName="_MarshalManagedExceptionMode" />
 			<Output TaskParameter="MarshalObjectiveCExceptionMode" PropertyName="_MarshalObjectiveCExceptionMode" />