diff --git a/sandbox/sandbox_services.target.darwin-x86_64.mk b/sandbox/sandbox_services.target.darwin-x86_64.mk
index 9cddbca..f1db3d3 100644
--- a/sandbox/sandbox_services.target.darwin-x86_64.mk
+++ b/sandbox/sandbox_services.target.darwin-x86_64.mk
@@ -74,6 +74,7 @@
 	'-DDISABLE_NACL' \
 	'-DCHROMIUM_BUILD' \
 	'-DUSE_LIBJPEG_TURBO=1' \
+	'-DENABLE_WEBRTC=1' \
 	'-DUSE_PROPRIETARY_CODECS' \
 	'-DENABLE_CONFIGURATION_POLICY' \
 	'-DDISCARDABLE_MEMORY_ALWAYS_SUPPORTED_NATIVELY' \
@@ -160,6 +161,7 @@
 	'-DDISABLE_NACL' \
 	'-DCHROMIUM_BUILD' \
 	'-DUSE_LIBJPEG_TURBO=1' \
+	'-DENABLE_WEBRTC=1' \
 	'-DUSE_PROPRIETARY_CODECS' \
 	'-DENABLE_CONFIGURATION_POLICY' \
 	'-DDISCARDABLE_MEMORY_ALWAYS_SUPPORTED_NATIVELY' \