diff --git a/testsuite/libffi.call/closure_stdcall.c b/testsuite/libffi.call/closure_stdcall.c
index 871d576d..fd1e4b03 100644
--- a/testsuite/libffi.call/closure_stdcall.c
+++ b/testsuite/libffi.call/closure_stdcall.c
@@ -23,10 +23,7 @@ closure_test_stdcall(ffi_cif* cif __UNUSED__, void* resp, void** args,
 
 }
 
-#ifndef _MSC_VER
-#define __stdcall __attribute__((stdcall))
-#endif
-typedef int (__stdcall *closure_test_type0)(int, int, int, int);
+typedef int (__STDCALL__ *closure_test_type0)(int, int, int, int);
 
 int main (void)
 {
diff --git a/testsuite/libffi.call/ffitest.h b/testsuite/libffi.call/ffitest.h
index 7c0f8e4b..2fc25357 100644
--- a/testsuite/libffi.call/ffitest.h
+++ b/testsuite/libffi.call/ffitest.h
@@ -21,9 +21,11 @@
 #undef __UNUSED__
 #if defined(__GNUC__)
 #define __UNUSED__ __attribute__((__unused__))
+#define __STDCALL__ __attribute__((stdcall))
 #define __FASTCALL__ __attribute__((fastcall))
 #else
 #define __UNUSED__
+#define __STDCALL__ __stdcall
 #define __FASTCALL__ __fastcall
 #endif