diff --git a/docs/english-vectors.md b/docs/english-vectors.md
index 52c35f1f5..5f17d4fd9 100644
--- a/docs/english-vectors.md
+++ b/docs/english-vectors.md
@@ -29,7 +29,7 @@ def load_vectors(fname):
     data = {}
     for line in fin:
         tokens = line.rstrip().split(' ')
-        data[tokens[0]] = map(float, tokens[1:])
+        data[tokens[0]] = list(map(float, tokens[1:]))
     return data
 ```