diff --git a/dll/directx/wine/d3dx9_36/d3dx9_36_private.h b/dll/directx/wine/d3dx9_36/d3dx9_36_private.h
index 72b1c9d38df..c5b089fdc61 100644
--- a/dll/directx/wine/d3dx9_36/d3dx9_36_private.h
+++ b/dll/directx/wine/d3dx9_36/d3dx9_36_private.h
@@ -48,8 +48,6 @@ WINE_DEFAULT_DEBUG_CHANNEL(d3dx);
 
 #define ULONG64_MAX (~(ULONG64)0)
 
-#define ARRAY_SIZE(array) (sizeof(array)/sizeof(*array))
-
 struct vec4
 {
     float x, y, z, w;
diff --git a/dll/win32/msi/tokenize.c b/dll/win32/msi/tokenize.c
index 52dd3dffde1..2c2307151de 100644
--- a/dll/win32/msi/tokenize.c
+++ b/dll/win32/msi/tokenize.c
@@ -70,8 +70,6 @@ static const WCHAR updateW[] = {'U','P','D','A','T','E'};
 static const WCHAR valuesW[] = {'V','A','L','U','E','S'};
 static const WCHAR whereW[] = {'W','H','E','R','E'};
 
-#define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
-
 /*
 ** These are the keywords
 ** They MUST be in alphabetical order
diff --git a/dll/win32/xmllite/writer.c b/dll/win32/xmllite/writer.c
index c4570a5801b..95f352b59ec 100644
--- a/dll/win32/xmllite/writer.c
+++ b/dll/win32/xmllite/writer.c
@@ -27,8 +27,6 @@
 /* not defined in public headers */
 DEFINE_GUID(IID_IXmlWriterOutput, 0xc1131708, 0x0f59, 0x477f, 0x93, 0x59, 0x7d, 0x33, 0x24, 0x51, 0xbc, 0x1a);
 
-#define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
-
 static const WCHAR closeelementW[] = {'<','/'};
 static const WCHAR closetagW[] = {' ','/','>'};
 static const WCHAR closepiW[] = {'?','>'};
diff --git a/sdk/include/xdk/winnt_old.h b/sdk/include/xdk/winnt_old.h
index f994f6bc6ac..254883e33f3 100644
--- a/sdk/include/xdk/winnt_old.h
+++ b/sdk/include/xdk/winnt_old.h
@@ -4227,6 +4227,10 @@ typedef struct _TP_CALLBACK_ENVIRON_V1 {
 } TP_CALLBACK_ENVIRON_V1, TP_CALLBACK_ENVIRON, *PTP_CALLBACK_ENVIRON;
 #endif /* (_WIN32_WINNT >= _WIN32_WINNT_WIN7) */
 
+#ifdef __WINESRC__
+# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif