diff --git a/my/jawbone/__init__.py b/my/jawbone/__init__.py
index 1323e18..d81fce9 100755
--- a/my/jawbone/__init__.py
+++ b/my/jawbone/__init__.py
@@ -227,7 +227,7 @@ def predicate(sleep: SleepEntry):
 
 def plot():
     # TODO FIXME melatonin data
-    melatonin_data = {}
+    melatonin_data = {} # type: ignore[var-annotated]
 
     # TODO ??
     sleeps = list(filter(predicate, load_sleeps()))