diff --git a/dlls/msvcp90/cxx.h b/dlls/msvcp90/cxx.h
index b2bec6570b2..721d02c5487 100644
--- a/dlls/msvcp90/cxx.h
+++ b/dlls/msvcp90/cxx.h
@@ -263,7 +263,7 @@ static void init_ ## type ## _cxx(char *base) \
 #define DEFINE_CXX_DATA4(name, cl1, cl2, cl3, cl4, dtor) \
     DEFINE_CXX_DATA(name, 4, cl1, cl2, cl3, cl4, dtor)
 
-#if defined(__i386__) && !defined(__MINGW32__)
+#ifdef __ASM_USE_THISCALL_WRAPPER
 
 #define CALL_VTBL_FUNC(this, off, ret, type, args) ((ret (WINAPI*)type)&vtbl_wrapper_##off)args
 
diff --git a/dlls/msvcp90/exception.c b/dlls/msvcp90/exception.c
index 15a6548b211..e9f6b6b804a 100644
--- a/dlls/msvcp90/exception.c
+++ b/dlls/msvcp90/exception.c
@@ -969,7 +969,7 @@ void __cdecl __ExceptionPtrCreate(exception_ptr *ep)
     ep->ref = NULL;
 }
 
-#if defined(__i386__) && !defined(__MINGW32__)
+#ifdef __ASM_USE_THISCALL_WRAPPER
 extern void call_dtor(const cxx_exception_type *type, void *func, void *object);
 
 __ASM_GLOBAL_FUNC( call_dtor,
diff --git a/dlls/msvcp90/misc.c b/dlls/msvcp90/misc.c
index acb13af51cc..4fb7ab24c11 100644
--- a/dlls/msvcp90/misc.c
+++ b/dlls/msvcp90/misc.c
@@ -711,7 +711,7 @@ unsigned int __cdecl _Random_device(void)
 #endif
 
 #if _MSVCP_VER >= 110
-#if defined(__i386__) && !defined(__MINGW32__)
+#ifdef __ASM_USE_THISCALL_WRAPPER
 
 extern void *call_thiscall_func;
 __ASM_GLOBAL_FUNC(call_thiscall_func,
diff --git a/dlls/msvcp90/msvcp_main.c b/dlls/msvcp90/msvcp_main.c
index e33fc6434f8..677234974e5 100644
--- a/dlls/msvcp90/msvcp_main.c
+++ b/dlls/msvcp90/msvcp_main.c
@@ -26,7 +26,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(msvcp);
 
-#if defined(__i386__) && !defined(__MINGW32__)
+#ifdef __ASM_USE_THISCALL_WRAPPER
 
 #define DEFINE_VTBL_WRAPPER(off)            \
     __ASM_GLOBAL_FUNC(vtbl_wrapper_ ## off, \