diff --git a/qt/aqt/addons.py b/qt/aqt/addons.py
index b5e534cce..5773e8e28 100644
--- a/qt/aqt/addons.py
+++ b/qt/aqt/addons.py
@@ -179,7 +179,7 @@ class AddonManager:
         sys.path.insert(0, self.addonsFolder())
 
     # in new code, you may want all_addon_meta() instead
-    def allAddons(self):
+    def allAddons(self) -> List[str]:
         l = []
         for d in os.listdir(self.addonsFolder()):
             path = self.addonsFolder(d)
@@ -188,7 +188,7 @@ class AddonManager:
             l.append(d)
         l.sort()
         if os.getenv("ANKIREVADDONS", ""):
-            l = reversed(l)
+            l = list(reversed(l))
         return l
 
     def all_addon_meta(self) -> Iterable[AddonMeta]:
diff --git a/qt/mypy.ini b/qt/mypy.ini
index ed6253bc7..04415f4cd 100644
--- a/qt/mypy.ini
+++ b/qt/mypy.ini
@@ -90,3 +90,5 @@ check_untyped_defs=true
 check_untyped_defs=true
 [mypy-aqt.webview]
 check_untyped_defs=true
+[mypy-aqt.addons]
+check_untyped_defs=true