diff --git a/dev/EnvironmentManager/API/Microsoft.Windows.System.EnvironmentManager.idl b/dev/EnvironmentManager/API/Microsoft.Windows.System.EnvironmentManager.idl
index 0937976c41..98203eec96 100644
--- a/dev/EnvironmentManager/API/Microsoft.Windows.System.EnvironmentManager.idl
+++ b/dev/EnvironmentManager/API/Microsoft.Windows.System.EnvironmentManager.idl
@@ -5,6 +5,10 @@
 
 namespace Microsoft.Windows.System
 {
+    [contractversion(1)]
+    apicontract WindowsSystemContract{};
+
+    [contract(WindowsSystemContract, 1)]
     runtimeclass EnvironmentManager
     {
         static EnvironmentManager GetForProcess();