diff --git a/random_sets/sets.py b/random_sets/sets.py
index eadcaf6..cd07d8b 100644
--- a/random_sets/sets.py
+++ b/random_sets/sets.py
@@ -28,7 +28,7 @@ class WeightedSet:
             if float(self.weights[i]) == 0.0:
                 continue
             nonzero_members.append(self.members[i])
-            nonzero_members.append(self.weights[i])
+            nonzero_weights.append(self.weights[i])
         return random.choices(nonzero_members, nonzero_weights)[0]
 
     def __add__(self, obj):