diff --git a/openmc/filter.py b/openmc/filter.py
index a9566b0f5a..2d8faf3784 100644
--- a/openmc/filter.py
+++ b/openmc/filter.py
@@ -1023,7 +1023,6 @@ class CollisionFilter(Filter):
         return element
 
 
-
 class RealFilter(Filter):
     """Tally modifier that describes phase-space and other characteristics