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-rw-r--r--python/vyos/firewall.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/vyos/firewall.py b/python/vyos/firewall.py
index 4993d855e..a2e133217 100644
--- a/python/vyos/firewall.py
+++ b/python/vyos/firewall.py
@@ -190,7 +190,7 @@ def parse_rule(rule_conf, fw_name, rule_id, ip_name):
def parse_tcp_flags(flags):
include = [flag for flag in flags if flag != 'not']
- exclude = flags['not'].keys() if 'not' in flags else []
+ exclude = list(flags['not']) if 'not' in flags else []
return f'tcp flags & ({"|".join(include + exclude)}) == {"|".join(include)}'
def parse_time(time):