diff --git a/lib/index.js b/lib/index.js
index 893c57b..827c8d8 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -267,17 +267,18 @@ function parseGrid(output) {
 
 function formatOutput(data) {
   var formatedData = [];
+
   data.forEach(function (d) {
     var pid = ( d.PID && d.PID[0] ) || ( d.ProcessId && d.ProcessId[0] ) || undefined;
     var cmd = d.CMD || d.CommandLine || d.COMMAND || undefined;
     var ppid = ( d.PPID && d.PPID[0] ) || ( d.ParentProcessId && d.ParentProcessId[0] ) || undefined;
 
     if (pid && cmd) {
-      var command = cmd[0];
+      var command = ensureCommand(cmd);
       var args = '';
 
-      if (cmd.length > 1) {
-        args = cmd.slice(1);
+      if (cmd.length > 0) {
+        args = cmd;
       }
 
       formatedData.push({
@@ -291,3 +292,28 @@ function formatOutput(data) {
 
   return formatedData;
 }
+
+/**
+ * ensure command exists
+ *
+ * @param cmd {array} parse command + arguments array, e.g,
+ *  [ '/Users/foo/dev/git/ps/test/with',
+ *    'space/sleep',
+ *     'with',
+ *     'space',
+ *     '1'
+ *  ];
+ * @returns {string} the command.  cmd is modified to only contain actual arguments.
+ */
+function ensureCommand(cmd) {
+  var command = cmd.shift();
+  var fs = require('fs');
+
+  while (cmd.length              // there's more
+    && cmd[0][0] !== '-'         // doesn't start with -
+    && !fs.existsSync(command)   // command doesn't exist
+    ) {
+    command += ' ' + cmd.shift();  // get next
+  }
+  return command;
+}
\ No newline at end of file
diff --git a/test/test.js b/test/test.js
index a682004..42c03c6 100644
--- a/test/test.js
+++ b/test/test.js
@@ -5,6 +5,7 @@ var Path = require('path');
 var Sinon = require('sinon');
 
 var serverPath = Path.resolve(__dirname, './node_process_for_test.js');
+var serverPathSpace = Path.resolve(__dirname, './with space/sleep with space');
 var UpperCaseArg = '--UPPER_CASE';
 var child = null;
 var pid = null;
@@ -197,3 +198,26 @@ describe('test', function () {
     });
   });
 });
+
+// don't run on Windows
+(process.platform === 'win32' ? describe.skip : describe)('test command with space', function () {
+  var sleep = 1;
+
+  before(function () {
+    child = CP.spawn(serverPathSpace, [sleep]);
+    pid = child.pid;
+  });
+
+  afterEach(killProcess);
+
+  it('by command with space in path', function (done) {
+    PS.lookup({command: 'with space'}, function (err, list) {
+      assert.equal(list.length, 1);
+      assert.equal(list[0].pid, pid);
+      assert.equal(list[0].command, serverPathSpace);
+      assert.equal(list[0].arguments[0], sleep);
+      done();
+    });
+  });
+
+});
\ No newline at end of file
diff --git a/test/with space/sleep with space b/test/with space/sleep with space
new file mode 120000
index 0000000..48f35bb
--- /dev/null
+++ b/test/with space/sleep with space	
@@ -0,0 +1 @@
+/bin/sleep
\ No newline at end of file