diff --git a/config/examples/file-input-filter-useragent-es-output.yml b/config/examples/file-input-filter-useragent-es-output.yml
index 82c40866..273241b5 100644
--- a/config/examples/file-input-filter-useragent-es-output.yml
+++ b/config/examples/file-input-filter-useragent-es-output.yml
@@ -7,15 +7,18 @@ options:
 input:
   stdin: true
   files:
-      - '/var/log/**/*.log'
+    - '/var/log/**/*.log'
 
 outputFilter:
   httpDeviceDetector: 
     module: httpDeviceDetector
-    # optional setting to configure the field name for the useragent
-    # will default to 'user_agent' if this config is omitted
+    # optional setting to configure the field name for the
+    # user agent and the user agent details
+    # userAgentFieldName will default to 'user_agent' if this config is omitted
+    # userAgentDetailsFieldName will default to 'user_agent_details' if this config is omitted
     # config:
     #   userAgentFieldName: user_agent
+    #   userAgentDetailsFieldName: user_agent_details
 
 output:
   # stdout: yaml  
diff --git a/lib/plugins/output-filter/httpDeviceDetector.js b/lib/plugins/output-filter/httpDeviceDetector.js
index 2b30fc51..5cacdcca 100644
--- a/lib/plugins/output-filter/httpDeviceDetector.js
+++ b/lib/plugins/output-filter/httpDeviceDetector.js
@@ -4,10 +4,12 @@ const deviceDetector = new DeviceDetector()
 module.exports = function (context, config, eventEmitter, log, callback) {
   try {
     const userAgentFieldName = config.userAgentFieldName || 'user_agent'
+    const userAgentDetailsFieldName = config.userAgentDetailsFieldName || 'user_agent_details'
+
     const userAgent = log[userAgentFieldName]
     const device = deviceDetector.parse(userAgent)
-    const logWithUserAgentDetails = { ...device, ...log }
 
+    const logWithUserAgentDetails = { [userAgentDetailsFieldName]: device, ...log }
     return callback(null, logWithUserAgentDetails)
   } catch (err) {
     return callback(null, log)