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diff --git a/configure.ac b/configure.ac
index 7dff9a01a8ef28c88bc76b81568262646ff80995..ef9f5ecdcf68fef4093978cf042ee3734df7d45e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,7 +113,6 @@ AC_CHECK_SIZEOF([void *])
CXXFLAGS="$CXXFLAGS -DSIZEOF_VOID_P=$ac_cv_sizeof_void_p"
BOOST_REQUIRE([1.36])
-BOOST_FILESYSTEM
# =====
# Debug
diff --git a/src/libixion/module.cpp b/src/libixion/module.cpp
index b6a4dfff3df7c24283c6b49e55fce7ac6dfb1c6b..7bdf32cbde2979328ec58b3eebf449996d3479d5 100644
--- a/src/libixion/module.cpp
+++ b/src/libixion/module.cpp
@@ -10,7 +10,6 @@
#include "ixion/compute_engine.hpp"
#include <sstream>
#include <vector>
-#include <boost/filesystem.hpp>
#ifdef _WIN32
#include <windows.h>
@@ -18,8 +17,6 @@
#include <dlfcn.h>
#endif
-namespace fs = boost::filesystem;
-
namespace ixion { namespace draft {
namespace {
diff --git a/m4/boost.m4 b/m4/boost.m4
index 706035d31c9aefcba52ceacb839ab2f3ee0168d5..342516e445312787f87a88742c23c603c2d22a12 100644
--- a/m4/boost.m4
+++ b/m4/boost.m4
@@ -1332,11 +1332,16 @@ BOOST_DEFUN([String_Algo],
# --------------------------------
# Look for Boost.System. For the documentation of PREFERRED-RT-OPT, see the
# documentation of BOOST_FIND_LIB above. This library was introduced in Boost
-# 1.35.0.
+# 1.35.0 and is header only since 1.70.
BOOST_DEFUN([System],
-[BOOST_FIND_LIB([system], [$1],
+[
+if test $boost_major_version -ge 170; then
+ BOOST_FIND_HEADER([boost/system/error_code.hpp])
+else
+ BOOST_FIND_LIB([system], [$1],
[boost/system/error_code.hpp],
[boost::system::error_code e; e.clear();], [], [], [$2])
+fi
])# BOOST_SYSTEM
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