diff --git a/Ccs/packet_config_ATHENA_DE.py b/Ccs/packet_config_ATHENA_DE.py
index e42e576b6d3b95359f29213eef872b3369b5e2a9..f970b690d31fd7adde521f2d7c058a06c320c854 100644
--- a/Ccs/packet_config_ATHENA_DE.py
+++ b/Ccs/packet_config_ATHENA_DE.py
@@ -659,7 +659,7 @@ class FpmProcessor:
 
 def filter_frames(objlist, empty_frames=True):
 
-    if not empty_frames:
+    if empty_frames:
         return [x for x in objlist if isinstance(x, EventFrame)]
     else:
         return [x for x in objlist if isinstance(x, EventFrame) and x.nevts > 0]