diff --git a/topi/python/topi/cuda/ssd/multibox.py b/topi/python/topi/cuda/ssd/multibox.py
index cb92e5ff44c72..599c729d95cae 100644
--- a/topi/python/topi/cuda/ssd/multibox.py
+++ b/topi/python/topi/cuda/ssd/multibox.py
@@ -438,7 +438,7 @@ def multibox_detection_gpu(cls_prob, loc_pred, anchor, clip=True, threshold=0.01
     """
     inter_out = multibox_transform_loc(cls_prob, loc_pred, anchor,
                                        clip, threshold, variances)
-    out = non_max_suppression(inter_out[0], inter_out[1], max_output_size = -1,
-                              iou_threshold = nms_threshold, force_suppress = force_suppress,
-                              top_k = nms_topk, return_indices=False)
+    out = non_max_suppression(inter_out[0], inter_out[1], max_output_size=-1,
+                              iou_threshold=nms_threshold, force_suppress=force_suppress,
+                              top_k=nms_topk, return_indices=False)
     return out
diff --git a/topi/python/topi/vision/ssd/multibox.py b/topi/python/topi/vision/ssd/multibox.py
index 81ce808432cba..f2211cb061b65 100644
--- a/topi/python/topi/vision/ssd/multibox.py
+++ b/topi/python/topi/vision/ssd/multibox.py
@@ -292,7 +292,7 @@ def multibox_detection(cls_prob, loc_pred, anchor, clip=True, threshold=0.01, nm
     """
     inter_out = multibox_transform_loc(cls_prob, loc_pred, anchor,
                                        clip, threshold, variances)
-    out = non_max_suppression(inter_out[0], inter_out[1], max_output_size = -1,
-                              iou_threshold = nms_threshold, force_suppress = force_suppress,
-                              top_k = nms_topk, return_indices=False)
+    out = non_max_suppression(inter_out[0], inter_out[1], max_output_size=-1,
+                              iou_threshold=nms_threshold, force_suppress=force_suppress,
+                              top_k=nms_topk, return_indices=False)
     return out