diff --git a/mbuni/configure.ac b/mbuni/configure.ac
index a142384..83dfcf6 100644
--- a/mbuni/configure.ac
+++ b/mbuni/configure.ac
@@ -225,7 +225,7 @@ else
         AC_MSG_RESULT([$gw_version])
         AC_MSG_CHECKING([Kannel libs])
         if ! $GW_CONFIG --libs &>/dev/null ; then
-                LIBS="$LIBS `$GW_CONFIG --libs`"
+                LDFLAGS="$LDFLAGS `$GW_CONFIG --libs`"
                 gw_libdir=`$GW_CONFIG --libs`
                 AC_MSG_RESULT([$gw_libdir])
         fi