diff --git a/src/xenia/kernel/objects/xsemaphore.h b/src/xenia/kernel/objects/xsemaphore.h
index 289ee9de9..97dbc7942 100644
--- a/src/xenia/kernel/objects/xsemaphore.h
+++ b/src/xenia/kernel/objects/xsemaphore.h
@@ -17,6 +17,7 @@ namespace xe {
 namespace kernel {
 
 struct X_SEMAPHORE {
+  X_DISPATCH_HEADER header;
   // TODO: Make this not empty!
 };