diff --git a/src/kits/interface/Menu.cpp b/src/kits/interface/Menu.cpp
index 7ae8f90ff4..e63ab35b6e 100644
--- a/src/kits/interface/Menu.cpp
+++ b/src/kits/interface/Menu.cpp
@@ -1161,7 +1161,9 @@ BMenu::InitData(BMessage *data)
 	if (data != NULL) {
 		data->FindInt32("_layout", (int32 *)&fLayout);
 		data->FindBool("_rsize_to_fit", &fResizeToFit);
-		data->FindBool("_disable", &fEnabled);
+		bool disabled;
+		if (data->FindBool("_disable", &disabled) == B_OK)
+			fEnabled = !disabled;
 		data->FindBool("_radio", &fRadioMode);
 		
 		bool disableTrigger = false;
diff --git a/src/kits/interface/MenuItem.cpp b/src/kits/interface/MenuItem.cpp
index 5f79d61e68..c9224fa0b3 100644
--- a/src/kits/interface/MenuItem.cpp
+++ b/src/kits/interface/MenuItem.cpp
@@ -179,16 +179,11 @@ BMenuItem::Instantiate(BMessage *data)
 }
 
 
-extern const char* B_CLASS_FIELD;
-
-
 status_t
 BMenuItem::Archive(BMessage *data, bool deep) const
 {
-	status_t ret = B_OK;
-	if (!data->HasString(B_CLASS_FIELD))
-		ret = data->AddString(B_CLASS_FIELD, "BMenuItem");
-	
+	status_t ret = BArchivable::Archive(data, deep);
+
 	if (ret == B_OK && fLabel)
 		ret = data->AddString("_label", Label());
 
diff --git a/src/kits/interface/SeparatorItem.cpp b/src/kits/interface/SeparatorItem.cpp
index 8339fe1d68..318bcf6667 100644
--- a/src/kits/interface/SeparatorItem.cpp
+++ b/src/kits/interface/SeparatorItem.cpp
@@ -33,14 +33,9 @@ BSeparatorItem::~BSeparatorItem()
 }
 
 
-extern const char* B_CLASS_FIELD;
-
 status_t
 BSeparatorItem::Archive(BMessage* archive, bool deep) const
 {
-	if (!archive->HasString(B_CLASS_FIELD))
-		archive->AddString(B_CLASS_FIELD, "BMenuItem");
-	
 	return BMenuItem::Archive(archive, deep);
 }