diff --git a/pkgs/applications/version-management/monotone/default.nix b/pkgs/applications/version-management/monotone/default.nix
index 6ea66b296d7..34c3e611d40 100644
--- a/pkgs/applications/version-management/monotone/default.nix
+++ b/pkgs/applications/version-management/monotone/default.nix
@@ -39,6 +39,8 @@ stdenv.mkDerivation rec {
     sed -e 's@/usr/bin/less@${less}/bin/less@' -i src/unix/terminal.cc
   '';
 
+  CXXFLAGS=" --std=c++11 ";
+
   nativeBuildInputs = [ pkg-config autoreconfHook texinfo ];
   buildInputs = [ boost zlib botan2 libidn lua pcre sqlite expect
     openssl gmp bzip2 perl ];