diff --git a/mypy.ini b/mypy.ini
index 7a859edce..0b62ded7c 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -157,3 +157,7 @@ disallow_incomplete_defs = True
 [mypy-qutebrowser.utils.urlutils]
 disallow_untyped_defs = True
 disallow_incomplete_defs = True
+
+[mypy-qutebrowser.utils.usertypes]
+disallow_untyped_defs = True
+disallow_incomplete_defs = True
diff --git a/qutebrowser/utils/usertypes.py b/qutebrowser/utils/usertypes.py
index 0030b74d5..d458dd5b6 100644
--- a/qutebrowser/utils/usertypes.py
+++ b/qutebrowser/utils/usertypes.py
@@ -452,7 +452,7 @@ class NavigationRequest:
         'other'
     ])
 
-    url = attr.ib()
-    navigation_type = attr.ib()
-    is_main_frame = attr.ib()
-    accepted = attr.ib(default=True)
+    url = attr.ib()  # type: QUrl
+    navigation_type = attr.ib()  # type: Type
+    is_main_frame = attr.ib()  # type: bool
+    accepted = attr.ib(default=True)  # type: bool