diff --git a/CHANGES.md b/CHANGES.md
index 7d2472c..8acc2ce 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,9 @@
 # bunyan Changelog
 
-## bunyan 0.5.4 (not yet released)
+## bunyan 0.6.0 (not yet released)
+
+- Add 'pid' automatic log record field.
 
-(nothing yet)
 
 ## bunyan 0.5.3
 
diff --git a/README.md b/README.md
index 06299a3..500f43d 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ be added, including support for custom formats.
 
     $ node hi.js | ./bin/bunyan  # CLI tool to filter/pretty-print JSON logs.
     [2012-01-31T00:08:11.387Z] INFO: myapp on banana.local: hi
-    
+
     $ node hi.js | ./bin/bunyan -o json
     {
       "name": "myapp",
@@ -69,7 +69,7 @@ be added, including support for custom formats.
 By default, log output is to stdout (**stream**) and at the "info" level.
 Explicitly that looks like:
 
-    var log = new Logger({name: "myapp", stream: process.stdout, 
+    var log = new Logger({name: "myapp", stream: process.stdout,
       level: "info"});
 
 That is an abbreviated form for a single stream. **You can defined multiple
@@ -101,7 +101,7 @@ same config as its parent, plus include the "component" field.
     var log = new Logger(...);
 
     ...
-    
+
     function Wuzzle(options) {
       this.log = options.log;
       this.log.info("creating a wuzzle")
@@ -109,7 +109,7 @@ same config as its parent, plus include the "component" field.
     Wuzzle.prototype.woos = function () {
       this.log.warn("This wuzzle is woosey.")
     }
-    
+
     var wuzzle = new Wuzzle({log: log.child({component: "wuzzle"})});
     wuzzle.woos();
     log.info("done with the wuzzle")
@@ -225,14 +225,14 @@ The lowercase level names are aliases supported in the API.
 Here is the API for changing levels in an existing logger:
 
     log.level() -> INFO   // gets current level (lowest level of all streams)
- 
+
     log.level(INFO)       // set all streams to level INFO
     log.level("info")     // set all streams to level INFO
 
     log.levels() -> [DEBUG, INFO]   // get array of levels of all streams
     log.levels(0) -> DEBUG          // get level of stream at index 0
     log.levels("foo")               // get level of stream with name "foo"
- 
+
     log.levels(0, INFO)             // set level of stream 0 to INFO
     log.levels(0, "info")           // can use "info" et al aliases
     log.levels("foo", WARN)         // set stream named "foo" to WARN
@@ -256,13 +256,14 @@ incorrect signature) is always a bug in Bunyan.**
 
 A typical Bunyan log record looks like this:
 
-    {"name":"myserver","hostname":"banana.local","req":{"method":"GET","url":"/path?q=1#anchor","headers":{"x-hi":"Mom","connection":"close"}},"level":3,"msg":"start request","time":"2012-02-03T19:02:46.178Z","v":0}
+    {"name":"myserver","hostname":"banana.local","pid":123,"req":{"method":"GET","url":"/path?q=1#anchor","headers":{"x-hi":"Mom","connection":"close"}},"level":3,"msg":"start request","time":"2012-02-03T19:02:46.178Z","v":0}
 
 Pretty-printed:
 
     {
       "name": "myserver",
       "hostname": "banana.local",
+      "pid": 123,
       "req": {
         "method": "GET",
         "url": "/path?q=1#anchor",
@@ -296,6 +297,7 @@ Core fields:
 - `hostname`: Required. String. Provided or determined at Logger creation.
   You can specify your hostname at Logger creation or it will be retrieved
   vi `os.hostname()`.
+- `pid`: Required. Integer. Filled in automatically at Logger creation.
 - `time`: Required. String. Added by Bunion. Can be overriden.
   The date and time of the event in [ISO 8601
   Extended Format](http://en.wikipedia.org/wiki/ISO_8601) format and in UTC,
@@ -317,7 +319,7 @@ Recommended/Best Practice Fields:
 
 -   `err`: Object. A caught JS exception. Log that thing with `log.info(err)`
     to get:
-  
+
         ...
         "err": {
           "message": "boom",
@@ -340,7 +342,7 @@ Recommended/Best Practice Fields:
 
 - `req`: An HTTP server request. Bunyan provides `Logger.stdSerializers.req`
   to serialize a request with a suggested set of keys. Example:
-  
+
         {
           "method": "GET",
           "url": "/path?q=1#anchor",
@@ -353,7 +355,7 @@ Recommended/Best Practice Fields:
         }
 
 - `res`: An HTTP server response. Bunyan provides `Logger.stdSerializers.res`
-  to serialize a response with a suggested set of keys. Example: 
+  to serialize a response with a suggested set of keys. Example:
 
         {
           "statusCode": 200,
@@ -446,5 +448,3 @@ See "TODO.md", but basically:
 - Syslog support.
 
 - Some speed comparisons with others to get a feel for Bunyan's speed.
-
-
diff --git a/bin/bunyan b/bin/bunyan
index a5cc210..bf5c381 100755
--- a/bin/bunyan
+++ b/bin/bunyan
@@ -5,7 +5,7 @@
 // See <https://github.com/trentm/node-bunyan>.
 //
 
-var VERSION = "0.5.4";
+var VERSION = "0.6.0";
 
 var util = require('util');
 var pathlib = require('path');
@@ -77,7 +77,7 @@ if (!format) {
       }
       return objects.join(' ');
     }
-  
+
     var i = 1;
     var args = arguments;
     var len = args.length;
@@ -164,7 +164,7 @@ function parseArgv(argv) {
     outputMode: OM_PAUL,
     jsonIndent: 2
   };
-  
+
   // Turn '-iH' into '-i -H', except for argument-accepting options.
   var args = argv.slice(2);  // drop ['node', 'scriptname']
   var newArgs = [];
@@ -231,7 +231,7 @@ function parseArgv(argv) {
         }
         parsed.args.push(arg);
         break;
-    } 
+    }
   }
   //TODO: '--' handling and error on a first arg that looks like an option.
 
@@ -264,7 +264,7 @@ function handleLogLine(line, opts) {
 
   switch (opts.outputMode) {
   case OM_PAUL:
-    //    [time] LEVEL: name[/component] on hostname (src): msg* (extras...)
+    //    [time] LEVEL: name[/component]/pid on hostname (src): msg* (extras...)
     //        msg*
     //        --
     //        long and multi-line extras
@@ -286,6 +286,9 @@ function handleLogLine(line, opts) {
     }
     delete rec.component;
 
+    nameStr += '/' + rec.pid;
+    delete rec.pid;
+
     var level = (upperNameFromLevel[rec.level] || "<level " + rec.level + ">");
     delete rec.level;
 
@@ -299,7 +302,7 @@ function handleLogLine(line, opts) {
       }
     }
     delete rec.src;
-    
+
     var hostname = rec.hostname;
     delete rec.hostname;
 
@@ -310,7 +313,7 @@ function handleLogLine(line, opts) {
       extras.push("req_id=" + rec.req_id);
     }
     delete rec.req_id;
-    
+
     if (rec.latency) {
       extras.push(rec.latency + "ms");
     }
@@ -367,7 +370,7 @@ function handleLogLine(line, opts) {
       }
     }
     delete rec.res;
-    
+
     if (rec.err && rec.err.stack) {
       details.push(indent(rec.err.stack))
     }
@@ -482,7 +485,7 @@ function main(argv) {
     util.puts("bunyan " + getVersion());
     return;
   }
-  
+
   var leftover = "";  // Left-over partial line from last chunk.
   var stdin = process.openStdin();
   stdin.setEncoding('utf8');
@@ -493,7 +496,7 @@ function main(argv) {
       leftover += lines[0];
       return;
     }
-    
+
     if (length > 1) {
       handleLogLine(leftover + lines[0], opts);
     }
@@ -503,7 +506,7 @@ function main(argv) {
       handleLogLine(lines[i], opts);
     }
   });
-  
+
   stdin.on('end', function () {
     if (leftover) {
       handleLogLine(leftover, opts);
@@ -525,6 +528,6 @@ if (require.main === module) {
       /* pass */
     };
   }
-  
+
   main(process.argv);
 }
diff --git a/lib/bunyan.js b/lib/bunyan.js
index 2aa867c..8801ece 100644
--- a/lib/bunyan.js
+++ b/lib/bunyan.js
@@ -4,7 +4,7 @@
  * The bunyan logging library for node.js.
  */
 
-var VERSION = "0.5.4";
+var VERSION = "0.6.0";
 
 // Bunyan log format version. This becomes the 'v' field on all log records.
 // `0` is until I release a version "1.0.0" of node-bunyan. Thereafter,
@@ -384,6 +384,9 @@ function Logger(options, _childOptions, _childSimple) {
   if (!fields.hostname) {
     fields.hostname = os.hostname();
   }
+  if (!fields.pid) {
+    fields.pid = process.pid;
+  }
   Object.keys(fields).forEach(function (k) {
     self.fields[k] = fields[k];
   });
diff --git a/package.json b/package.json
index 36f064d..5422bfb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bunyan",
-  "version": "0.5.4",
+  "version": "0.6.0",
   "description": "a JSON Logger library for node.js servers",
   "main": "./lib/bunyan.js",
   "bin": {