diff --git a/src/tree.py b/src/tree.py
index cc04293..d6a44cf 100644
--- a/src/tree.py
+++ b/src/tree.py
@@ -57,6 +57,8 @@ class NerdTree():
       item_type = 'l'
     elif path_object.is_file():
       item_type = 'f'
+    elif path_object.is_socket():
+      item_type = 's'
 
     assert item_type