diff --git a/pylint/plugins/hass_enforce_type_hints.py b/pylint/plugins/hass_enforce_type_hints.py
index 9607c0222d9bf2..e76db49fe72b44 100644
--- a/pylint/plugins/hass_enforce_type_hints.py
+++ b/pylint/plugins/hass_enforce_type_hints.py
@@ -711,6 +711,7 @@ class ClassTypeHintMatch:
     TypeHintMatch(
         function_name="icon",
         return_type=["str", None],
+        mandatory=True,
     ),
     TypeHintMatch(
         function_name="entity_picture",