diff --git a/app/samba_utils.py b/app/samba_utils.py
index e359852..c32c00c 100755
--- a/app/samba_utils.py
+++ b/app/samba_utils.py
@@ -935,11 +935,11 @@ def save_shares(shares):
             "comment": "comment",
             "browseable": "browseable",
             "read_only": "read only",
-            "guest ok": "guest ok",
+            "guest_ok": "guest ok",
             "valid_users": "valid users",
-            "write list": "write list",
+            "write_list": "write list",
             "create_mask": "create mask",
-            "directory mask": "directory mask",
+            "directory_mask": "directory mask",
             "force_group": "force group",
             "max_connections": "max connections",
         }