1 diff --git a/js/src/moz.build b/js/src/moz.build
2 index 1162cb70c..595ea9842 100644
5 @@ -785,7 +785,7 @@ if CONFIG['JS_HAS_CTYPES']:
6 DEFINES['FFI_BUILDING'] = True
9 - CXXFLAGS += ['-Wno-shadow', '-Werror=format']
10 + CXXFLAGS += ['-Wno-shadow']
12 # Suppress warnings in third-party code.
13 if CONFIG['CLANG_CXX']: