--- a/gfx/angle/moz.build
+++ b/gfx/angle/moz.build
@@ -130,13 +130,14 @@ FINAL_LIBRARY = 'gkmedias'
 
 DEFINES['ANGLE_DISABLE_TRACE'] = True
 DEFINES['ANGLE_COMPILE_OPTIMIZATION_LEVEL'] = 'D3DCOMPILE_OPTIMIZATION_LEVEL1'
 DEFINES['COMPILER_IMPLEMENTATION'] = True
 
 # Suppress warnings in third-party code.
 if CONFIG['GNU_CXX']:
     CXXFLAGS += [
+        '-Wno-attributes',
         '-Wno-sign-compare',
         '-Wno-unknown-pragmas',
     ]
     if CONFIG['CLANG_CXX']:
         CXXFLAGS += ['-Wno-unused-private-field']