diff --git a/reactos/sdk/include/psdk/shlobj.h b/reactos/sdk/include/psdk/shlobj.h
index 33f73fa05fc..d7ee779ad91 100644
--- a/reactos/sdk/include/psdk/shlobj.h
+++ b/reactos/sdk/include/psdk/shlobj.h
@@ -691,6 +691,15 @@ DECLARE_INTERFACE_(IACList,IUnknown)
 #endif
 
 /* IACList2 interface */
+
+#define ACLO_NONE           0x00000000
+#define ACLO_CURRENTDIR     0x00000001
+#define ACLO_MYCOMPUTER     0x00000002
+#define ACLO_DESKTOP        0x00000004
+#define ACLO_FAVORITES      0x00000008
+#define ACLO_FILESYSONLY    0x00000010
+#define ACLO_FILESYSDIRS    0x00000020
+
 #define INTERFACE IACList2
 DECLARE_INTERFACE_(IACList2,IACList)
 {