diff --git a/src/KingSystem/ActorSystem/actBaseProcMgr.h b/src/KingSystem/ActorSystem/actBaseProcMgr.h
index cbd6dddf..fce3b9a0 100644
--- a/src/KingSystem/ActorSystem/actBaseProcMgr.h
+++ b/src/KingSystem/ActorSystem/actBaseProcMgr.h
@@ -10,6 +10,7 @@
 #include <prim/seadScopedLock.h>
 #include <prim/seadSizedEnum.h>
 #include <prim/seadStorageFor.h>
+#include <prim/seadTypedBitFlag.h>
 #include <thread/seadAtomic.h>
 #include <thread/seadCriticalSection.h>
 #include "KingSystem/ActorSystem/actBaseProc.h"