--- a/toolkit/library/moz.build
+++ b/toolkit/library/moz.build
@@ -59,17 +59,17 @@ def Libxul(name):
     Libxul_defines()
 
     if CONFIG['MOZ_NEEDS_LIBATOMIC']:
         OS_LIBS += ['atomic']
 
     # This option should go away in bug 1290972, but we need to wait until
     # Rust 1.12 has been released.
     if CONFIG['OS_ARCH'] == 'Darwin':
-        LDFLAGS += ['-Wl,-no_compact_unwind']
+        LDFLAGS += ['-Wl,-no_compact_unwind,-lresolv']
 
 Libxul('xul')
 
 FORCE_STATIC_LIB = True
 
 STATIC_LIBRARY_NAME = 'xul_s'
 
 SOURCES += [