diff --git a/m4/opm_dynlink_boost_test.m4 b/m4/opm_dynlink_boost_test.m4
index 7c5982b1..7005b552 100644
--- a/m4/opm_dynlink_boost_test.m4
+++ b/m4/opm_dynlink_boost_test.m4
@@ -44,8 +44,8 @@ AC_REQUIRE([AX_BOOST_UNIT_TEST_FRAMEWORK])
 _opm_LIBS_SAVE="${LIBS}"
 _opm_CPPFLAGS_SAVE="${CPPFLAGS}"
 
-LIBS="${BOOST_LDFLAGS} ${BOOST_UNIT_TEST_FRAMEWORK_LIB} ${LIBS}"
-CPPFLAGS="${BOOST_CPPFLAGS} ${CPPFLAGS}"
+LIBS="${OPM_BOOST_LDFLAGS} ${BOOST_UNIT_TEST_FRAMEWORK_LIB} ${LIBS}"
+CPPFLAGS="${OPM_BOOST_CPPFLAGS} ${CPPFLAGS}"
 
 AC_LANG_PUSH([C++])