diff --git a/brightray/brightray.gypi b/brightray/brightray.gypi
index 82f4cdf55adb..12c5049e8907 100644
--- a/brightray/brightray.gypi
+++ b/brightray/brightray.gypi
@@ -118,6 +118,8 @@
       'Common_Base': {
         'abstract': 1,
         'defines': [
+          # Used by content_browser_client.h:
+          'ENABLE_WEBRTC',
           # We are using Release version libchromiumcontent:
           'NDEBUG',
           # Needed by gin: