diff --git a/dlls/itss/itss.c b/dlls/itss/itss.c
index 1448632d81c..33b1608d8c0 100644
--- a/dlls/itss/itss.c
+++ b/dlls/itss/itss.c
@@ -141,7 +141,7 @@ static const IClassFactoryVtbl ITSSCF_Vtbl =
 };
 
 static const IClassFactoryImpl ITStorage_factory = { &ITSSCF_Vtbl, ITSS_create };
-static const IClassFactoryImpl ITSProtocol_factory = { &ITSSCF_Vtbl, ITS_IParseDisplayName_create };
+static const IClassFactoryImpl MSITStore_factory = { &ITSSCF_Vtbl, ITS_IParseDisplayName_create };
 
 /***********************************************************************
  *		DllGetClassObject	(ITSS.@)
@@ -154,8 +154,8 @@ HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 
     if (IsEqualGUID(&CLSID_ITStorage, rclsid))
         factory = &ITStorage_factory;
-    else if (IsEqualGUID(&CLSID_ITSProtocol, rclsid))
-        factory = &ITSProtocol_factory;
+    else if (IsEqualGUID(&CLSID_MSITStore, rclsid))
+        factory = &MSITStore_factory;
     else
     {
 	FIXME("%s: no class found.\n", debugstr_guid(rclsid));
diff --git a/dlls/itss/regsvr.c b/dlls/itss/regsvr.c
index 675af8adb05..bac6ac17b48 100644
--- a/dlls/itss/regsvr.c
+++ b/dlls/itss/regsvr.c
@@ -513,7 +513,7 @@ static struct regsvr_coclass const coclass_list[] = {
         "itss.dll",
         "Both"
     },
-    {   &CLSID_ITSProtocol,
+    {   &CLSID_MSITStore,
         "Microsoft InforTech Protocol for IE 3.0",
         NULL,
         "itss.dll",
diff --git a/include/wine/itss.idl b/include/wine/itss.idl
index 8566855ee21..b613b6b6662 100644
--- a/include/wine/itss.idl
+++ b/include/wine/itss.idl
@@ -89,5 +89,5 @@ interface IITStorage : IUnknown
         [in] ECompactionLev iLev);
 }
 
-cpp_quote("DEFINE_GUID(CLSID_ITStorage,0x5d02926a,0x212e,0x11d0,0x9d,0xf9,0x00,0xa0,0xc9,0x22,0xe6,0xec );")
-cpp_quote("DEFINE_GUID(CLSID_ITSProtocol,0x9d148290,0xb9c8,0x11d0,0xa4,0xcc,0x00,0x00,0xf8,0x01,0x49,0xf6);")
+cpp_quote("DEFINE_GUID(CLSID_ITStorage,0x5d02926a,0x212e,0x11d0,0x9d,0xf9,0x00,0xa0,0xc9,0x22,0xe6,0xec);")
+cpp_quote("DEFINE_GUID(CLSID_MSITStore,0x9d148290,0xb9c8,0x11d0,0xa4,0xcc,0x00,0x00,0xf8,0x01,0x49,0xf6);")