diff --git a/sdk/xtdk/ketypes.h b/sdk/xtdk/ketypes.h
index 4528aa6..340d886 100644
--- a/sdk/xtdk/ketypes.h
+++ b/sdk/xtdk/ketypes.h
@@ -443,11 +443,15 @@ typedef struct _KAPC_STATE
     BOOLEAN UserApcPending;
 } KAPC_STATE, *PKAPC_STATE;
 
-/* Event gate structure definition */
-typedef struct _KGATE
+/* Mutex object structure definition */
+typedef struct _KMUTEX
 {
     DISPATCHER_HEADER Header;
-} KGATE, *PKGATE;
+    LIST_ENTRY MutexListEntry;
+    PKTHREAD OwnerThread;
+    BOOLEAN Abandoned;
+    UCHAR ApcDisable;
+} KMUTEX, *PKMUTEX;
 
 /* Push Lock structure definition */
 typedef union _KPUSH_LOCK
@@ -467,11 +471,7 @@ typedef union _KPUSH_LOCK
 /* Push lock wait block structure definition */
 typedef struct _KPUSH_LOCK_WAIT_BLOCK
 {
-    union
-    {
-        KGATE WakeGate;
-        KEVENT WakeEvent;
-    };
+    KEVENT WakeEvent;
     PKPUSH_LOCK_WAIT_BLOCK Next;
     PKPUSH_LOCK_WAIT_BLOCK Last;
     PKPUSH_LOCK_WAIT_BLOCK Previous;
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index e20d1de..c181720 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -263,8 +263,8 @@ typedef struct _KDPC KDPC, *PKDPC;
 typedef struct _KDPC_DATA KDPC_DATA, *PKDPC_DATA;
 typedef struct _KERNEL_INITIALIZATION_BLOCK KERNEL_INITIALIZATION_BLOCK, *PKERNEL_INITIALIZATION_BLOCK;
 typedef struct _KEVENT KEVENT, *PKEVENT;
-typedef struct _KGATE KGATE, *PKGATE;
 typedef struct _KLOCK_QUEUE_HANDLE KLOCK_QUEUE_HANDLE, *PKLOCK_QUEUE_HANDLE;
+typedef struct _KMUTEX KMUTEX, *PKMUTEX;
 typedef struct _KPROCESS KPROCESS, *PKPROCESS;
 typedef struct _KPUSH_LOCK_WAIT_BLOCK KPUSH_LOCK_WAIT_BLOCK, *PKPUSH_LOCK_WAIT_BLOCK;
 typedef struct _KQUEUE KQUEUE, *PKQUEUE;