diff --git a/backend/src/packages/chaiNNer_standard/image_filter/miscellaneous/edge_detection.py b/backend/src/packages/chaiNNer_standard/image_filter/miscellaneous/edge_detection.py
index bd3e8373e4..e6f1a8f4f6 100644
--- a/backend/src/packages/chaiNNer_standard/image_filter/miscellaneous/edge_detection.py
+++ b/backend/src/packages/chaiNNer_standard/image_filter/miscellaneous/edge_detection.py
@@ -173,7 +173,7 @@ def g_x() -> np.ndarray:
             return cv2.filter2D(img, -1, filter_x)
 
         def g_y() -> np.ndarray:
-            filter = filter_y or np.rot90(filter_x, 1)
+            filter = filter_y if filter_y is not None else np.rot90(filter_x, 1)
             return cv2.filter2D(img, -1, filter)
 
         if algorithm == Algorithm.ROBERTS: