diff --git a/src/CxbxDebugger/ThreadHelpers.cs b/src/CxbxDebugger/ThreadHelpers.cs
index 922974bdd..eb9c2015a 100644
--- a/src/CxbxDebugger/ThreadHelpers.cs
+++ b/src/CxbxDebugger/ThreadHelpers.cs
@@ -345,6 +345,10 @@ namespace CxbxDebugger
         /// <summary>
         /// 
         /// </summary>
+        StatusHandleNotClosable = 0xC0000235,
+        /// <summary>
+        /// 
+        /// </summary>
         GuardPageViolation = 0x80000001,
         /// <summary>
         ///