diff --git a/include/interfaces.h b/include/interfaces.h
index ef6f6437439..26f28d516f5 100644
--- a/include/interfaces.h
+++ b/include/interfaces.h
@@ -25,6 +25,26 @@ DEFINE_OLEGUID(IID_IRootStorage,0x12,0,0);
 DEFINE_OLEGUID(IID_IMessageFilter,0x16,0,0);
 DEFINE_OLEGUID(IID_IStdMarshalInfo,0x18,0,0);
 
+
+DEFINE_OLEGUID(IID_IDispatch,       0x00020400,0,0);
+DEFINE_OLEGUID(IID_ITypeInfo,       0x00020401,0,0);
+DEFINE_OLEGUID(IID_ITypeLib,        0x00020402,0,0);
+DEFINE_OLEGUID(IID_ITypeComp,       0x00020403,0,0);
+DEFINE_OLEGUID(IID_IEnumVariant,    0x00020404,0,0);
+DEFINE_OLEGUID(IID_ICreateTypeInfo, 0x00020405,0,0);
+DEFINE_OLEGUID(IID_ICreateTypeLib,  0x00020406,0,0);
+DEFINE_OLEGUID(IID_ICreateTypeInfo2,0x0002040E,0,0);
+DEFINE_OLEGUID(IID_ICreateTypeLib2, 0x0002040F,0,0);
+DEFINE_OLEGUID(IID_ITypeChangeEvents,0x00020410,0,0);
+DEFINE_OLEGUID(IID_ITypeLib2,       0x00020411,0,0);
+DEFINE_OLEGUID(IID_ITypeInfo2,      0x00020412,0,0);
+DEFINE_GUID(IID_IErrorInfo,         0x1CF2B120,0x547D,0x101B,0x8E,0x65,
+        0x08,0x00, 0x2B,0x2B,0xD1,0x19);
+DEFINE_GUID(IID_ICreateErrorInfo,   0x22F03340,0x547D,0x101B,0x8E,0x65,
+        0x08,0x00, 0x2B,0x2B,0xD1,0x19);
+DEFINE_GUID(IID_ISupportErrorInfo,  0xDF0B3D60,0x547D,0x101B,0x8E,0x65,
+        0x08,0x00, 0x2B,0x2B,0xD1,0x19);
+
 #include "objbase.h"
 
 #define THIS LPCLASSFACTORY this