diff --git a/reactos/include/ddk/pstypes.h b/reactos/include/ddk/pstypes.h
index fbb5bfc04f2..480d6d2c363 100644
--- a/reactos/include/ddk/pstypes.h
+++ b/reactos/include/ddk/pstypes.h
@@ -186,7 +186,7 @@ typedef struct _KTHREAD
    ULONG             WaitMode;
    UCHAR             WaitNext;
    UCHAR             WaitReason;
-   PVOID             WaitBlockList;
+   PKWAIT_BLOCK      WaitBlockList;
    LIST_ENTRY        WaitListEntry;
    ULONG             WaitTime;
    KPRIORITY         BasePriority;