diff --git a/pgadmin/dlg/dlgType.cpp b/pgadmin/dlg/dlgType.cpp
index 5f3a36c..9c8d3e3 100644
--- a/pgadmin/dlg/dlgType.cpp
+++ b/pgadmin/dlg/dlgType.cpp
@@ -523,7 +526,7 @@ void dlgType::OnMemberAdd(wxCommandEvent &ev)
 		type += wxT(")");
 	}
 
-	if (!name.IsEmpty())
+	if (!name.IsEmpty() && lstMembers->FindItem(-1, name, false) == -1)
 	{
 		size_t pos = lstMembers->GetItemCount();
 		lstMembers->InsertItem(pos, name, 0);