diff --git a/js/src/aclocal.m4 b/js/src/aclocal.m4
index afa8271875..9fb315e850 100644
--- a/js/src/aclocal.m4
+++ b/js/src/aclocal.m4
@@ -23,6 +23,7 @@ builtin(include, build/autoconf/compiler-opts.m4)dnl
 builtin(include, build/autoconf/expandlibs.m4)dnl
 builtin(include, build/autoconf/arch.m4)dnl
 builtin(include, build/autoconf/android.m4)dnl
+builtin(include, build/autoconf/ios.m4)dnl
 builtin(include, build/autoconf/zlib.m4)dnl
 builtin(include, build/autoconf/linux.m4)dnl
 builtin(include, build/autoconf/python-virtualenv.m4)dnl