diff --git a/arrakis/utils/exceptions.py b/arrakis/utils/exceptions.py
index 49b22de..356e822 100644
--- a/arrakis/utils/exceptions.py
+++ b/arrakis/utils/exceptions.py
@@ -34,3 +34,7 @@ class ReadError(OSError):
 class RegistryError(Exception):
     """Raised when a registry operation with the archiving
     and unpacking registeries fails"""
+
+
+class DivergenceError(Exception):
+    """Raised when a divergence is detected"""