diff --git a/interfaces.hpp b/interfaces.hpp
index bf45545..89ef128 100644
--- a/interfaces.hpp
+++ b/interfaces.hpp
@@ -29,6 +29,11 @@
     }
 
     virtual ReadReturn read(void) = 0;
+
+    virtual bool getFailed(void) const
+    {
+        return false;
+    }
 };
 
 /*