diff --git a/layout/media/moz.build b/layout/media/moz.build
index f52cdbd9e79..84a14f872a5 100644
--- a/layout/media/moz.build
+++ b/layout/media/moz.build
@@ -8,4 +8,5 @@ MODULE = 'layout'
 
 LIBRARY_NAME = 'gkmedias'
 
-DIRS += ['webrtc']
+if CONFIG['MOZ_WEBRTC']:
+    DIRS += ['webrtc']