diff --git a/spinn_machine/version/abstract_version.py b/spinn_machine/version/abstract_version.py
index d152a87b..ef0aeec1 100644
--- a/spinn_machine/version/abstract_version.py
+++ b/spinn_machine/version/abstract_version.py
@@ -313,7 +313,7 @@ def minimum_cores_expected(self) -> int:
         """
 
     @abstractmethod
-    def illegal_ethernet_message(self, x:int, y:int) -> Optional[str]:
+    def illegal_ethernet_message(self, x: int, y: int) -> Optional[str]:
         """
         Checks if x and y could be for an ethernet
 
@@ -327,4 +327,4 @@ def illegal_ethernet_message(self, x:int, y:int) -> Optional[str]:
         :param int x:
         :param int y:
         :return: An explanation that the x and y can never be an ethernet
-        """
\ No newline at end of file
+        """