1 files changed, 1 insertions, 1 deletions
diff --git a/shv_x.h b/shv_x.h
index 95eac78..bb86f0d 100644
--- a/shv_x.h
+++ b/shv_x.h
@@ -38,7 +38,7 @@ struct _SHV_CALLBACK_CONTEXT;
 typedef
 void
 SHV_CPU_CALLBACK (
-    struct _SHV_CALLBACK_CONTEXT* Context
+    _In_ struct _SHV_CALLBACK_CONTEXT* Context
     );
 typedef SHV_CPU_CALLBACK *PSHV_CPU_CALLBACK;