diff --git a/dom/mathml/moz.build b/dom/mathml/moz.build
index 307c1603e7..d483008aaa 100644
--- a/dom/mathml/moz.build
+++ b/dom/mathml/moz.build
@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     'nsMathMLElement.cpp',
     'nsMathMLElementFactory.cpp',
 ]
@@ -12,6 +12,5 @@ UNIFIED_SOURCES += [
 include('/ipc/chromium/chromium-config.mozbuild')
 
 FINAL_LIBRARY = 'xul'
-LOCAL_INCLUDES += [
-    '/dom/base',
-]
+
+LOCAL_INCLUDES += ['/dom/base']