diff --git a/interfaces.hpp b/interfaces.hpp
index bbd5b4a..013822c 100644
--- a/interfaces.hpp
+++ b/interfaces.hpp
@@ -44,6 +44,11 @@
     {
         return false;
     }
+
+    virtual std::string getFailReason(void) const
+    {
+        return "Unimplemented";
+    }
 };
 
 /*