diff --git a/lib/ember_cli.rb b/lib/ember_cli.rb
index d8b8d677260..6c7cd26633c 100644
--- a/lib/ember_cli.rb
+++ b/lib/ember_cli.rb
@@ -60,7 +60,7 @@ module EmberCli
   end
 
   def self.parse_source_map_path(file)
-    File.read("#{dist_dir}/assets/#{file}")[%r{^//# sourceMappingURL=(.*)$}, 1]
+    File.read("#{dist_dir}/assets/#{file}")[%r{//# sourceMappingURL=(.*)$}, 1]
   end
 
   def self.is_ember_cli_asset?(name)