diff --git a/slothy/core/core.py b/slothy/core/core.py
index 49470d89..5994d38b 100644
--- a/slothy/core/core.py
+++ b/slothy/core/core.py
@@ -55,6 +55,9 @@
 class SlothyException(Exception):
     """Generic exception thrown by SLOTHY"""
 
+class SlothySelfCheckException(SlothyException):
+    """Exception thrown by SLOTHY during tht selfcheck """
+
 class Result(LockAttributes):
     """The results of a one-shot SLOTHY optimization run"""