diff --git a/aclocal.m4 b/aclocal.m4
index 4b557a8..cf6fb44 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1337,6 +1337,7 @@
 m4_include([m4/ax_cxx_namespaces.m4])
 m4_include([m4/ax_gcc_archflag.m4])
 m4_include([m4/ax_gcc_x86_cpuid.m4])
+m4_include([m4/ax_lang_compiler_ms.m4])
 m4_include([m4/ax_opencl.m4])
 m4_include([m4/ax_prefix_config_h.m4])
 m4_include([m4/ax_prog_perl_version.m4])