diff --git a/README.md b/README.md
index 33d234c..e5f9146 100644
--- a/README.md
+++ b/README.md
@@ -209,6 +209,20 @@ coverageReporter: {
 }
 ```
 
+#### includeAllSources
+**Type:** Boolean
+
+You can opt to include all sources files, as indicated by the coverage preprocessor, in your code coverage data, even if there are no tests covering them. (Default `false`)
+
+```javascript
+coverageReporter: {
+  type : 'text',
+  dir : 'coverage/',
+  file : 'coverage.txt',
+  includeAllSources: true
+}
+```
+
 #### multiple reporters
 You can use multiple reporters, by providing array of options.
 
diff --git a/lib/coverageMap.js b/lib/coverageMap.js
new file mode 100644
index 0000000..5146096
--- /dev/null
+++ b/lib/coverageMap.js
@@ -0,0 +1,19 @@
+var coverageMap = {};
+
+function addCoverage(coverageObj){
+	coverageMap[coverageObj.path] = coverageObj;
+}
+
+function getCoverageMap(){
+  return coverageMap;
+}
+
+function resetCoverage(){
+	coverageMap = {};
+}
+
+module.exports = {
+    add: addCoverage,
+    get: getCoverageMap,
+    reset: resetCoverage
+  };
diff --git a/lib/preprocessor.js b/lib/preprocessor.js
index ac61eea..39b2a23 100644
--- a/lib/preprocessor.js
+++ b/lib/preprocessor.js
@@ -1,13 +1,15 @@
 var istanbul  = require('istanbul'),
     minimatch = require('minimatch'),
     globalSourceCache = require('./sourceCache'),
-    extend = require('util')._extend;
+    extend = require('util')._extend,
+    coverageMap = require('./coverageMap');
 
 var createCoveragePreprocessor = function(logger, basePath, reporters, coverageReporter) {
   var log = logger.create('preprocessor.coverage');
   var instrumenterOverrides = (coverageReporter && coverageReporter.instrumenter) || {};
   var instrumenters = extend({istanbul: istanbul}, (coverageReporter && coverageReporter.instrumenters));
   var sourceCache = globalSourceCache.getByBasePath(basePath);
+  var includeAllSources = coverageReporter && coverageReporter.includeAllSources === true;
   var instrumentersOptions = Object.keys(instrumenters).reduce(function getInstumenterOptions(memo, instrumenterName){
     memo[instrumenterName] = (coverageReporter && coverageReporter.instrumenterOptions && coverageReporter.instrumenterOptions[instrumenterName]) || {};
     return memo;
@@ -62,6 +64,17 @@ var createCoveragePreprocessor = function(logger, basePath, reporters, coverageR
       // remember the actual immediate instrumented JS for given original path
       sourceCache[jsPath] = content;
 
+      if (includeAllSources) {
+        var coverageObjRegex = /\{.*"path".*"fnMap".*"statementMap".*"branchMap".*\}/g;
+        var coverageObjMatch = coverageObjRegex.exec(instrumentedCode);
+
+        if (coverageObjMatch !== null) {
+			var coverageObj = JSON.parse(coverageObjMatch[0]);
+			
+			coverageMap.add(coverageObj);
+        }
+      }
+
       done(instrumentedCode);
     });
   };
diff --git a/lib/reporter.js b/lib/reporter.js
index d00c35d..3312f12 100644
--- a/lib/reporter.js
+++ b/lib/reporter.js
@@ -4,6 +4,7 @@ var util = require('util');
 var istanbul = require('istanbul');
 var dateformat = require('dateformat');
 var globalSourceCache = require('./sourceCache');
+var coverageMap = require('./coverageMap');
 
 
 var Store = istanbul.Store;
@@ -39,6 +40,7 @@ var CoverageReporter = function(rootConfig, helper, logger) {
   var basePath = rootConfig.basePath;
   var reporters = config.reporters;
   var sourceCache = globalSourceCache.getByBasePath(basePath);
+  var includeAllSources = config.includeAllSources === true;
 
   if (!helper.isDefined(reporters)) {
     reporters = [config];
@@ -91,14 +93,15 @@ var CoverageReporter = function(rootConfig, helper, logger) {
 
     // TODO(vojta): remove once we don't care about Karma 0.10
     if (browsers) {
-      browsers.forEach(function(browser) {
-        collectors[browser.id] = new istanbul.Collector();
-      });
+      browsers.forEach(this.onBrowserStart.bind(this));
     }
   };
 
   this.onBrowserStart = function(browser) {
     collectors[browser.id] = new istanbul.Collector();
+    if(includeAllSources){
+      collectors[browser.id].add(coverageMap.get());
+    }
   };
 
   this.onBrowserComplete = function(browser, result) {
diff --git a/test/coverageMap.spec.coffee b/test/coverageMap.spec.coffee
new file mode 100644
index 0000000..588307b
--- /dev/null
+++ b/test/coverageMap.spec.coffee
@@ -0,0 +1,28 @@
+coverageMap = require '../lib/coverageMap'
+coverageObj = { path: './path.js', otherThings: 'that are in instrumented code' }
+
+describe 'coverageMap', ->
+  it 'should add coverageMap and get them', ->
+    coverageMap.add(coverageObj)
+
+    expect(coverageMap.get()['./path.js']).to.equal coverageObj
+
+  it 'should be able to be reset', ->
+    coverageMap.reset()
+
+    expect(coverageMap.get()['./path.js']).to.not.exist
+
+    coverageMap.add(coverageObj)
+
+    expect(coverageMap.get()['./path.js']).to.equal coverageObj
+
+    coverageMap.reset()
+
+    expect(coverageMap.get()['./path.js']).to.not.exist
+
+  it 'should be able to have multiple coverageMap', ->
+    coverageMap.reset()
+    coverageMap.add(coverageObj)
+    coverageMap.add({ path: './anotherFile.js', moarKeys: [1, 2, 3] })
+
+    expect(Object.keys(coverageMap.get()).length).to.equal 2
diff --git a/test/preprocessor.spec.coffee b/test/preprocessor.spec.coffee
index 81da4ae..026b33c 100644
--- a/test/preprocessor.spec.coffee
+++ b/test/preprocessor.spec.coffee
@@ -1,6 +1,8 @@
 vm = require 'vm'
 util = require 'util'
 
+coverageMap = require '../lib/coverageMap'
+
 describe 'preprocessor', ->
   createPreprocessor = require '../lib/preprocessor'
 
@@ -124,3 +126,33 @@ describe 'preprocessor', ->
           '**/*.coffee': 'madeup'
     expect(work).to.throw()
     done()
+
+  it 'should add coverageMap when including all sources', (done) ->
+    process = createPreprocessor mockLogger, '/base/path', ['coverage'], { includeAllSources: true }
+    file = new File '/base/path/file.js'
+
+    coverageMap.reset()
+
+    process ORIGINAL_CODE, file, (preprocessedCode) ->
+      expect(coverageMap.get()['./file.js']).to.exist
+      done()
+
+  it 'should not add coverageMap when not including all sources', (done) ->
+    process = createPreprocessor mockLogger, '/base/path', ['coverage'], { includeAllSources: false }
+    file = new File '/base/path/file.js'
+
+    coverageMap.reset()
+
+    process ORIGINAL_CODE, file, (preprocessedCode) ->
+      expect(coverageMap.get()['./file.js']).to.not.exist
+      done()
+
+  it 'should not add coverageMap in the default state', (done) ->
+    process = createPreprocessor mockLogger, '/base/path', ['coverage'], {}
+    file = new File '/base/path/file.js'
+
+    coverageMap.reset()
+
+    process ORIGINAL_CODE, file, (preprocessedCode) ->
+      expect(coverageMap.get()['./file.js']).to.not.exist
+      done()
diff --git a/test/reporter.spec.coffee b/test/reporter.spec.coffee
index c2e31bf..7520a92 100644
--- a/test/reporter.spec.coffee
+++ b/test/reporter.spec.coffee
@@ -38,6 +38,9 @@ describe 'reporter', ->
     merge: (v...) -> helper.merge v...
     mkdirIfNotExists: mockMkdir
     normalizeWinPath: (path) -> helper.normalizeWinPath path
+  mockCoverageMap =
+    add: sinon.spy()
+    get: sinon.spy()
 
   mocks =
     fs: mockFs
@@ -46,6 +49,7 @@ describe 'reporter', ->
       Collector: mockCollector
       Report: create: mockReportCreate
     dateformat: require 'dateformat'
+    './coverageMap': mockCoverageMap
 
   beforeEach ->
     m = loadFile __dirname + '/../lib/reporter.js', mocks
@@ -246,3 +250,46 @@ describe 'reporter', ->
       rootConfig.coverageReporter.reporters = [{ type: 'text-summary', file: 'file' }]
       run()
       expect(mockMkdir).to.have.been.calledTwice
+
+    it 'should support including all sources', ->
+      customConfig = _.merge {}, rootConfig,
+        coverageReporter:
+          dir: 'defaultdir'
+          includeAllSources: true
+
+      mockCoverageMap.get.reset()
+      mockAdd.reset()
+
+      reporter = new m.CoverageReporter customConfig, mockHelper, mockLogger
+      reporter.onRunStart()
+      browsers.forEach (b) -> reporter.onBrowserStart b
+
+      expect(mockCoverageMap.get).to.have.been.called
+      expect(mockAdd).to.have.been.calledWith mockCoverageMap.get.returnValues[0]
+
+    it 'should not retrieve the coverageMap if we aren\'t including all sources', ->
+      customConfig = _.merge {}, rootConfig,
+        coverageReporter:
+          dir: 'defaultdir'
+          includeAllSources: false
+
+      mockCoverageMap.get.reset()
+
+      reporter = new m.CoverageReporter customConfig, mockHelper, mockLogger
+      reporter.onRunStart()
+      browsers.forEach (b) -> reporter.onBrowserStart b
+
+      expect(mockCoverageMap.get).not.to.have.been.called
+
+    it 'should default to not including all sources', ->
+      customConfig = _.merge {}, rootConfig,
+        coverageReporter:
+          dir: 'defaultdir'
+
+      mockCoverageMap.get.reset()
+
+      reporter = new m.CoverageReporter customConfig, mockHelper, mockLogger
+      reporter.onRunStart()
+      browsers.forEach (b) -> reporter.onBrowserStart b
+
+      expect(mockCoverageMap.get).not.to.have.been.called