diff --git a/python/cudf/cudf/core/column/categorical.py b/python/cudf/cudf/core/column/categorical.py
index 59fd4631067..30a70759db4 100644
--- a/python/cudf/cudf/core/column/categorical.py
+++ b/python/cudf/cudf/core/column/categorical.py
@@ -1373,7 +1373,7 @@ def _concat(
 
         # Find the first non-null column:
         head = next(
-            (obj for obj in objs if not obj.null_count != len(obj)), objs[0]
+            (obj for obj in objs if obj.null_count != len(obj)), objs[0]
         )
 
         # Combine and de-dupe the categories