diff --git a/scripts/py_matter_idl/matter_idl/lint/lint_rules_parser.py b/scripts/py_matter_idl/matter_idl/lint/lint_rules_parser.py
index 81e47de716a2e4..9499e360399230 100755
--- a/scripts/py_matter_idl/matter_idl/lint/lint_rules_parser.py
+++ b/scripts/py_matter_idl/matter_idl/lint/lint_rules_parser.py
@@ -167,7 +167,7 @@ def GetLinterRules(self):
     def RequireAttribute(self, r: AttributeRequirement):
         self._required_attributes_rule.RequireAttribute(r)
 
-    def FindClusterCode(self, name: str) -> Optionarl[Tuple[str, int]]:
+    def FindClusterCode(self, name: str) -> Optional[Tuple[str, int]]:
         if name not in self._cluster_codes:
             # Name may be a number. If this can be parsed as a number, accept it anyway
             try: