diff --git a/python-package/lightgbm/basic.py b/python-package/lightgbm/basic.py
index 3a07cc1cb8f3..1834994e6889 100644
--- a/python-package/lightgbm/basic.py
+++ b/python-package/lightgbm/basic.py
@@ -1364,7 +1364,7 @@ def __init__(
         free_raw_data : bool, optional (default=True)
             If True, raw data is freed after constructing inner Dataset.
         """
-        self.handle: Optional[ctypes.c_void_p] = None
+        self.handle: Optional[_DatasetHandle] = None
         self.data = data
         self.label = label
         self.reference = reference