diff --git a/matter_server/server/stack.py b/matter_server/server/stack.py
index 5a4ebcb9..e4e63ac0 100644
--- a/matter_server/server/stack.py
+++ b/matter_server/server/stack.py
@@ -60,6 +60,7 @@ def init_logging(category: str) -> None:
     """Initialize Matter SDK logging. Filter by category."""
 
     _LOGGER.info("Initializing CHIP/Matter Logging...")
+    global _category_num  # pylint: disable=global-statement  # noqa: PLW0603
     _category_num = ERROR_CATEGORY_NONE
     if category == "ERROR":
         _category_num = ERROR_CATEGORY_ERROR