diff --git a/reactos/include/ddk/wdm.h b/reactos/include/ddk/wdm.h
index d70b8cf9ea7..1f82d9e8dfd 100644
--- a/reactos/include/ddk/wdm.h
+++ b/reactos/include/ddk/wdm.h
@@ -7713,7 +7713,9 @@ FORCEINLINE
 VOID
 KeMemoryBarrier(VOID)
 {
-  volatile LONG Barrier;
+  LONG Barrier, *Dummy = &Barrier;
+  UNREFERENCED_LOCAL_VARIABLE(Dummy);
+
 #if defined(__GNUC__)
   __asm__ __volatile__ ("xchg %%eax, %0" : : "m" (Barrier) : "%eax");
 #elif defined(_MSC_VER)
diff --git a/reactos/include/psdk/windef.h b/reactos/include/psdk/windef.h
index 1fa768b2ecd..d1ca30f75e5 100644
--- a/reactos/include/psdk/windef.h
+++ b/reactos/include/psdk/windef.h
@@ -417,11 +417,6 @@ typedef struct _FILETIME {
 # define DECL_WINELIB_TYPE_AW(type)  typedef WINELIB_NAME_AW(type) type;
 #endif
 
-#define UNREFERENCED_PARAMETER(P) {(P)=(P);}
-#define UNREFERENCED_LOCAL_VARIABLE(L) {(L)=(L);}
-#define DBG_UNREFERENCED_PARAMETER(P)
-#define DBG_UNREFERENCED_LOCAL_VARIABLE(L)
-
 #ifndef __WATCOMC__
 #ifndef _export
 #define _export
diff --git a/reactos/include/psdk/winnt.h b/reactos/include/psdk/winnt.h
index 10e82d04e1a..94a5602208d 100644
--- a/reactos/include/psdk/winnt.h
+++ b/reactos/include/psdk/winnt.h
@@ -66,6 +66,10 @@
 #endif
 #endif /* __ANONYMOUS_DEFINED */
 
+#define UNREFERENCED_PARAMETER(P) {(P)=(P);}
+#define UNREFERENCED_LOCAL_VARIABLE(L) {(L)=(L);}
+#define DBG_UNREFERENCED_PARAMETER(P)
+#define DBG_UNREFERENCED_LOCAL_VARIABLE(L)
 
 #ifndef DECLSPEC_ALIGN
 # if defined(_MSC_VER) && (_MSC_VER >= 1300) && !defined(MIDL_PASS)
@@ -5251,7 +5255,8 @@ FORCEINLINE
 VOID
 MemoryBarrier(VOID)
 {
-    LONG Barrier;
+    LONG Barrier, *Dummy = &Barrier;
+    UNREFERENCED_LOCAL_VARIABLE(Dummy);
     __asm__ __volatile__("xchgl %%eax, %[Barrier]" : : [Barrier] "m" (Barrier) : "memory");
 }
 #endif
diff --git a/reactos/include/xdk/x86/ke.h b/reactos/include/xdk/x86/ke.h
index 003d560044a..87e66b32ca8 100644
--- a/reactos/include/xdk/x86/ke.h
+++ b/reactos/include/xdk/x86/ke.h
@@ -51,7 +51,9 @@ FORCEINLINE
 VOID
 KeMemoryBarrier(VOID)
 {
-  volatile LONG Barrier;
+  LONG Barrier, *Dummy = &Barrier;
+  UNREFERENCED_LOCAL_VARIABLE(Dummy);
+
 #if defined(__GNUC__)
   __asm__ __volatile__ ("xchg %%eax, %0" : : "m" (Barrier) : "%eax");
 #elif defined(_MSC_VER)