diff --git a/dom/u2f/moz.build b/dom/u2f/moz.build
index 1c851e1d82..19325205a4 100644
--- a/dom/u2f/moz.build
+++ b/dom/u2f/moz.build
@@ -10,7 +10,7 @@ EXPORTS.mozilla.dom += [
     'USBToken.h',
 ]
 
-UNIFIED_SOURCES += [
+SOURCES += [
     'NSSU2FTokenRemote.cpp',
     'U2F.cpp',
     'USBToken.cpp',