1 files changed, 4 insertions, 3 deletions
diff --git a/netdisco/ssdp.py b/netdisco/ssdp.py
index 55cb08b..7c4dd9c 100644
--- a/netdisco/ssdp.py
+++ b/netdisco/ssdp.py
@@ -4,6 +4,7 @@ import select
 import socket
 import logging
 from datetime import datetime, timedelta
+from typing import Dict, List, Optional, Set  # noqa: F401
 from xml.etree import ElementTree
 
 import requests
@@ -33,7 +34,7 @@ class SSDP:
 
     def __init__(self):
         """Initialize the discovery."""
-        self.entries = []
+        self.entries = []  # type: List[UPNPEntry]
         self.last_scan = None
 
     def scan(self):
@@ -65,7 +66,7 @@ class SSDP:
         """
         self.update()
 
-        seen = set()
+        seen = set()  # type: Set[Optional[str]]
         results = []
 
         # Make unique based on the location since we don't care about ST here
@@ -100,7 +101,7 @@ class SSDP:
 class UPNPEntry:
     """Found uPnP entry."""
 
-    DESCRIPTION_CACHE = {'_NO_LOCATION': {}}
+    DESCRIPTION_CACHE = {'_NO_LOCATION': {}}  # type: Dict[str, Dict]
 
     def __init__(self, values):
         """Initialize the discovery."""