diff --git a/mo/imports.py b/mo/imports.py
index 511602b4669cd3d27c88b8b6230db430d9737604..4bcaa635d3b59f2b0836d409ca82eda91618dbad 100644
--- a/mo/imports.py
+++ b/mo/imports.py
@@ -287,7 +287,7 @@ class Import:
         # Definováno odvozenými třídami
         assert NotImplementedError()
 
-    def log_start(self, path):
+    def log_start(self, path) -> None:
         args = [f'user=#{self.user.user_id}', f'fmt={self.fmt.name}']
         if self.round is not None:
             args.append(f'round=#{self.round.round_id}')
@@ -300,7 +300,7 @@ class Import:
 
         logger.info('Import: %s ze souboru %s: %s', self.log_msg_prefix, path, " ".join(args))
 
-    def log_end(self):
+    def log_end(self) -> None:
         args = [f'rows=#{self.cnt_rows}']
         for key, val in [
             ('users', self.cnt_new_users),