diff --git a/src/XMakeBuildEngine/Utilities/RegistryKeyWrapper.cs b/src/XMakeBuildEngine/Utilities/RegistryKeyWrapper.cs
index a062fd683c8..d7d9559d59f 100644
--- a/src/XMakeBuildEngine/Utilities/RegistryKeyWrapper.cs
+++ b/src/XMakeBuildEngine/Utilities/RegistryKeyWrapper.cs
@@ -226,6 +226,7 @@ private RegistryKey WrappedKey
                         if (ExceptionHandling.NotExpectedRegistryException(ex))
                             throw;
 
+                        _attemptedToOpenRegistryKey = true;
                         throw new RegistryException(ex.Message, Name, ex);
                     }
                     finally