diff --git a/distiller/pruning/ranked_structures_pruner.py b/distiller/pruning/ranked_structures_pruner.py
index 4816410c900b912ceb64852edac7b14a33cbbf8b..b4a667cb931328fc3e022b79c856213028e9c891 100755
--- a/distiller/pruning/ranked_structures_pruner.py
+++ b/distiller/pruning/ranked_structures_pruner.py
@@ -20,6 +20,7 @@ import distiller
 from .pruner import _ParameterPruner
 msglogger = logging.getLogger()
 
+
 # TODO: support different policies for ranking structures
 class L1RankedStructureParameterPruner(_ParameterPruner):
     """Uses mean L1-norm to rank structures and prune a specified percentage of structures
@@ -94,7 +95,7 @@ class L1RankedStructureParameterPruner(_ParameterPruner):
     def rank_prune_filters(self, fraction_to_prune, param, param_name, zeros_mask_dict):
         assert param.dim() == 4, "This thresholding is only supported for 4D weights"
         view_filters = param.view(param.size(0), -1)
-        filter_mags = view_filters.data.abs().mean(dim=1)
+        filter_mags = view_filters.data.norm(1, dim=1)  # same as view_filters.data.abs().sum(dim=1)
         topk_filters = int(fraction_to_prune * filter_mags.size(0))
         if topk_filters == 0:
             msglogger.info("Too few filters - can't prune %.1f%% filters", 100*fraction_to_prune)