diff --git a/golem/core/optimisers/adaptive/mab_agents/mab_agent.py b/golem/core/optimisers/adaptive/mab_agents/mab_agent.py
index 538c2ed2..91b0274d 100644
--- a/golem/core/optimisers/adaptive/mab_agents/mab_agent.py
+++ b/golem/core/optimisers/adaptive/mab_agents/mab_agent.py
@@ -82,7 +82,7 @@ def save(self, path_to_save: Optional[str] = None):
         if not path_to_save.endswith('.pkl'):
             os.makedirs(path_to_save, exist_ok=True)
             mabs_num = [int(name.split('_')[0]) for name in os.listdir(path_to_save)
-                        if re.fullmatch(r'\d_mab.pkl', name)]
+                        if re.fullmatch(r'\d*_mab.pkl', name)]
             if not mabs_num:
                 max_saved_mab = 0
             else: