diff --git a/reactos/w32api/include/excpt.h b/reactos/w32api/include/excpt.h
index 3c18cd41e39..646de45466c 100644
--- a/reactos/w32api/include/excpt.h
+++ b/reactos/w32api/include/excpt.h
@@ -14,8 +14,10 @@
 #ifndef	_EXCPT_H_
 #define	_EXCPT_H_
 
-/* All the headers include this file. */
+/* All the headers include this file. */
+#if defined(__MINGW32__)
 #include <_mingw.h>
+#endif
 
 #include <windef.h>
 
diff --git a/reactos/w32api/include/objsel.h b/reactos/w32api/include/objsel.h
index 4e2f3177e21..a8619bdb0aa 100644
--- a/reactos/w32api/include/objsel.h
+++ b/reactos/w32api/include/objsel.h
@@ -22,6 +22,11 @@ extern "C" {
 #endif
 
 #include <unknwn.h>
+#include <oaidl.h>
+#include <objidl.h>
+
+#define INITGUID
+#include <initguid.h>
 
 DEFINE_GUID(CLSID_DsObjectPicker, 0x17d6ccd8, 0x3b7b, 0x11d2, 0x00b9, 0xe0,0x00,0xc0,0x4f,0xd8,0xdb,0xf7);
 DEFINE_GUID(IID_IDsObjectPicker, 0x0c87e64e, 0x3b7a, 0x11d2, 0x00b9, 0xe0,0x00,0xc0,0x4f,0xd8,0xdb,0xf7);