diff --git a/src/TypeSystem/src/Common/ThreadSafeFlags.cs b/src/TypeSystem/src/Common/ThreadSafeFlags.cs
index 8a022987a63..c01653f44a3 100644
--- a/src/TypeSystem/src/Common/ThreadSafeFlags.cs
+++ b/src/TypeSystem/src/Common/ThreadSafeFlags.cs
@@ -6,7 +6,7 @@
 
 namespace Internal.TypeSystem
 {
-    struct ThreadSafeFlags
+    public struct ThreadSafeFlags
     {
         private volatile int _value;