diff --git a/qutebrowser/api/interceptor.py b/qutebrowser/api/interceptor.py
index 634ae1409..78819dc46 100644
--- a/qutebrowser/api/interceptor.py
+++ b/qutebrowser/api/interceptor.py
@@ -24,7 +24,11 @@ from qutebrowser.extensions import interceptors
 from qutebrowser.extensions.interceptors import Request
 
 
-def register(interceptor: interceptors.InterceptorType) -> None:
+#: Type annotation for an interceptor function.
+InterceptorType = interceptors.InterceptorType
+
+
+def register(interceptor: InterceptorType) -> None:
     """Register a request interceptor.
 
     Whenever a request happens, the interceptor gets called with a
diff --git a/qutebrowser/extensions/interceptors.py b/qutebrowser/extensions/interceptors.py
index 269c82ab8..7defcf213 100644
--- a/qutebrowser/extensions/interceptors.py
+++ b/qutebrowser/extensions/interceptors.py
@@ -47,6 +47,7 @@ class Request:
         self.is_blocked = True
 
 
+#: Type annotation for an interceptor function.
 InterceptorType = typing.Callable[[Request], None]