diff --git a/src/Tasks/AssignProjectConfiguration.cs b/src/Tasks/AssignProjectConfiguration.cs
index ba5062c1ce5..5b098493801 100644
--- a/src/Tasks/AssignProjectConfiguration.cs
+++ b/src/Tasks/AssignProjectConfiguration.cs
@@ -13,6 +13,7 @@
 
 namespace Microsoft.Build.Tasks
 {
+    [MSBuildMultiThreadableTask]
     public class AssignProjectConfiguration : ResolveProjectBase
     {
         #region Properties