diff --git a/lib/ansible/modules/network/aci/aci_firmware_policy.py b/lib/ansible/modules/network/aci/aci_firmware_policy.py
index 32fd724ab1..e4d8885a6b 100644
--- a/lib/ansible/modules/network/aci/aci_firmware_policy.py
+++ b/lib/ansible/modules/network/aci/aci_firmware_policy.py
@@ -101,7 +101,7 @@ error:
 raw:
   description: The raw output returned by the APIC REST API (xml or json)
   returned: parse error
-  type: string
+  type: str
   sample: '<?xml version="1.0" encoding="UTF-8"?><imdata totalCount="1"><error code="122" text="unknown managed object class foo"/></imdata>'
 sent:
   description: The actual/minimal configuration pushed to the APIC
@@ -150,17 +150,17 @@ proposed:
 filter_string:
   description: The filter string used for the request
   returned: failure or debug
-  type: string
+  type: str
   sample: ?rsp-prop-include=config-only
 method:
   description: The HTTP method used for the request to the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: POST
 response:
   description: The HTTP response from the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: OK (30 bytes)
 status:
   description: The HTTP status from the APIC
@@ -170,7 +170,7 @@ status:
 url:
   description: The HTTP url used for the request to the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: https://10.11.12.13/api/mo/uni/tn-production.json
 '''