old mode 100644
new mode 100755
--- a/media/webrtc/moz.build
+++ b/media/webrtc/moz.build
@@ -66,17 +66,17 @@ if CONFIG['MOZ_VALGRIND']:
 elif CONFIG['MOZ_ASAN']:
     gyp_vars_copy.update(build_for_tool="asan")
 elif CONFIG['MOZ_TSAN']:
     gyp_vars_copy.update(build_for_tool="tsan")
 
 GYP_DIRS['trunk'].input = 'trunk/peerconnection.gyp'
 GYP_DIRS['trunk'].variables = gyp_vars_copy
 # We allow warnings for third-party code that can be updated from upstream.
-GYP_DIRS['trunk'].sandbox_vars['COMPILE_FLAGS'] = {'WARNINGS_AS_ERRORS': []}
+GYP_DIRS['trunk'].sandbox_vars['COMPILE_FLAGS'] = {'WARNINGS_AS_ERRORS': [], 'OS_CXXFLAGS' : CONFIG['SSE2_FLAGS']}
 GYP_DIRS['trunk'].sandbox_vars['FINAL_LIBRARY'] = 'webrtc'
 GYP_DIRS['trunk'].non_unified_sources += webrtc_non_unified_sources
 
 if CONFIG['MOZ_WEBRTC_SIGNALING']:
     DIRS += [
         'signaling/src/common',
         'signaling/src/jsep',
         'signaling/src/media-conduit',