diff --git a/configure.in b/configure.in
index 48b78ba..8509aa7 100644
--- a/configure.in
+++ b/configure.in
@@ -80,6 +80,7 @@ CXXFLAGS="${CXXFLAGS:-}"
 
 # languages
 AC_LANG(C++)
+AX_CXX_COMPILE_STDCXX_11(noext, optional)
 
 # programs
 AC_PROG_CXX