diff --git a/reactos/include/ddk/wdm.h b/reactos/include/ddk/wdm.h
index 6dce8251736..153a5e6aef8 100644
--- a/reactos/include/ddk/wdm.h
+++ b/reactos/include/ddk/wdm.h
@@ -9589,6 +9589,33 @@ void __PREfastPagedCodeLocked(void);
  *                         Runtime Library Functions                          *
  ******************************************************************************/
 
+#define FAST_FAIL_LEGACY_GS_VIOLATION           0
+#define FAST_FAIL_VTGUARD_CHECK_FAILURE         1
+#define FAST_FAIL_STACK_COOKIE_CHECK_FAILURE    2
+#define FAST_FAIL_CORRUPT_LIST_ENTRY            3
+#define FAST_FAIL_INCORRECT_STACK               4
+#define FAST_FAIL_INVALID_ARG                   5
+#define FAST_FAIL_GS_COOKIE_INIT                6
+#define FAST_FAIL_FATAL_APP_EXIT                7
+#define FAST_FAIL_RANGE_CHECK_FAILURE           8
+#define FAST_FAIL_UNSAFE_REGISTRY_ACCESS        9
+#define FAST_FAIL_GUARD_ICALL_CHECK_FAILURE     10
+#define FAST_FAIL_GUARD_WRITE_CHECK_FAILURE     11
+#define FAST_FAIL_INVALID_FIBER_SWITCH          12
+#define FAST_FAIL_INVALID_SET_OF_CONTEXT        13
+#define FAST_FAIL_INVALID_REFERENCE_COUNT       14
+#define FAST_FAIL_INVALID_JUMP_BUFFER           18
+#define FAST_FAIL_MRDATA_MODIFIED               19
+#define FAST_FAIL_INVALID_FAST_FAIL_CODE        0xFFFFFFFF
+
+DECLSPEC_NORETURN
+FORCEINLINE
+VOID
+RtlFailFast(
+  _In_ ULONG Code)
+{
+  __fastfail(Code);
+}
 
 #if !defined(MIDL_PASS) && !defined(SORTPP_PASS)
 
diff --git a/reactos/include/xdk/rtlfuncs.h b/reactos/include/xdk/rtlfuncs.h
index 6854515341f..323da4baafc 100644
--- a/reactos/include/xdk/rtlfuncs.h
+++ b/reactos/include/xdk/rtlfuncs.h
@@ -3,6 +3,33 @@
  ******************************************************************************/
 
 $if (_WDMDDK_)
+#define FAST_FAIL_LEGACY_GS_VIOLATION           0
+#define FAST_FAIL_VTGUARD_CHECK_FAILURE         1
+#define FAST_FAIL_STACK_COOKIE_CHECK_FAILURE    2
+#define FAST_FAIL_CORRUPT_LIST_ENTRY            3
+#define FAST_FAIL_INCORRECT_STACK               4
+#define FAST_FAIL_INVALID_ARG                   5
+#define FAST_FAIL_GS_COOKIE_INIT                6
+#define FAST_FAIL_FATAL_APP_EXIT                7
+#define FAST_FAIL_RANGE_CHECK_FAILURE           8
+#define FAST_FAIL_UNSAFE_REGISTRY_ACCESS        9
+#define FAST_FAIL_GUARD_ICALL_CHECK_FAILURE     10
+#define FAST_FAIL_GUARD_WRITE_CHECK_FAILURE     11
+#define FAST_FAIL_INVALID_FIBER_SWITCH          12
+#define FAST_FAIL_INVALID_SET_OF_CONTEXT        13
+#define FAST_FAIL_INVALID_REFERENCE_COUNT       14
+#define FAST_FAIL_INVALID_JUMP_BUFFER           18
+#define FAST_FAIL_MRDATA_MODIFIED               19
+#define FAST_FAIL_INVALID_FAST_FAIL_CODE        0xFFFFFFFF
+
+DECLSPEC_NORETURN
+FORCEINLINE
+VOID
+RtlFailFast(
+  _In_ ULONG Code)
+{
+  __fastfail(Code);
+}
 
 #if !defined(MIDL_PASS) && !defined(SORTPP_PASS)