diff --git a/index.js b/index.js
index 7abe0af..86addb6 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,7 @@ var through = require("through2");
 var assign = require("object-assign");
 var path  = require('path');
 var sass = require("node-sass");
+var applySourceMap = require('vinyl-sourcemaps-apply');
 
 var PLUGIN_NAME = 'gulp-sass';
 
@@ -21,6 +22,11 @@ module.exports = function(options) {
     var opts = assign({}, options);
     opts.file = file.path;
 
+    // Generate Source Maps if plugin source-map present
+    if (file.sourceMap) {
+      opts.sourceMap = file.path;
+    }
+
     var callback = function(error, obj) {
       if (error) {
         return cb(new gutil.PluginError(
@@ -28,8 +34,30 @@ module.exports = function(options) {
         ));
       }
 
+      // Build Source Maps!
+      if (obj.map) {
+        // hack to remove the already added sourceMappingURL from libsass
+        obj.css = obj.css.toString().replace(/\/\*#\s*sourceMappingURL\=.*\*\//, '');
+
+        // libsass gives us sources' paths relative to file;
+        // gulp-sourcemaps needs sources' paths relative to file.base;
+        // so alter the sources' paths to please gulp-sourcemaps.
+        obj.map = JSON.parse(obj.map.toString());
+
+        if (obj.map.sources) {
+          obj.map.sources = obj.map.sources.map(function(source) {
+            var abs = path.resolve(path.dirname(file.path), source);
+            return path.relative(file.base, abs);
+          });
+
+          obj.map = JSON.stringify(obj.map);
+          applySourceMap(file, obj.map);
+        }
+      }
+
       file.contents = new Buffer(obj.css);
       file.path = gutil.replaceExtension(file.path, '.css');
+
       cb(null, file);
     };