diff --git a/.werks/7796 b/.werks/7796
new file mode 100644
index 0000000000000..220ae1618a33b
--- /dev/null
+++ b/.werks/7796
@@ -0,0 +1,11 @@
+Title: aix_if: Do not crash if agent does not send information about 'flags'
+Level: 1
+Component: checks
+Class: fix
+Compatible: compat
+Edition: cre
+State: unknown
+Version: 1.6.0b2
+Date: 1560414614
+
+
diff --git a/checks/aix_if b/checks/aix_if
index 51522120762dd..5fd43f33966f9 100644
--- a/checks/aix_if
+++ b/checks/aix_if
@@ -91,9 +91,10 @@ def parse_aix_if(info):
 
     if_table = []
     for nic in nic_info:
-        if "Up" in nic_info[nic]["flags"]:
+        flags = nic_info[nic].get("flags", [])
+        if "Up" in flags:
             nic_info[nic]["ifOperStatus"] = 1
-        elif "Down" in nic_info[nic]["flags"]:
+        elif "Down" in flags:
             nic_info[nic]["ifOperStatus"] = 2
         # No information from entstat. We consider interfaces up
         # if they have been used at least some time since the
diff --git a/tests/unit/checks/generictests/datasets/aix_if_5b72baa05be96_regression.py b/tests/unit/checks/generictests/datasets/aix_if_5b72baa05be96_regression.py
new file mode 100644
index 0000000000000..be7e23628d381
--- /dev/null
+++ b/tests/unit/checks/generictests/datasets/aix_if_5b72baa05be96_regression.py
@@ -0,0 +1,19 @@
+# -*- encoding: utf-8
+# yapf: disable
+
+
+checkname = u'aix_if'
+
+
+info = [[u'[en3]'],
+        [u'Hardware', u'Address:', u'00:AA:BB:CC:DD:EE'],
+        [u'Packets:', u'38832476370', u'Packets:', u'4125941951'],
+        [u'Bytes:', u'57999949458755', u'Bytes:', u'627089523952']]
+
+
+discovery = {'': [('1', "{'state': ['1'], 'speed': 0}")]}
+
+
+checks = {'': [('1',
+                {'errors': (0.01, 0.1), 'speed': 0, 'state': ['1']},
+                [(0, '[en3] (up) MAC: 00:AA:BB:CC:DD:EE, speed unknown', [])])]}
\ No newline at end of file