diff --git a/Makefile.am b/Makefile.am
index 2ebf4d59..b0d3837c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -412,7 +412,7 @@ noinst_PROGRAMS=			\
 	mordor/examples/tunnel		\
 	mordor/examples/udpstats
 
-if BOOST_PROGRAM_OPTIONS
+if HAVE_BOOST_PROGRAM_OPTIONS
 noinst_PROGRAMS += mordor/examples/wget
 endif
 
diff --git a/m4/ax_boost_program_options.m4 b/m4/ax_boost_program_options.m4
index ad2ac1ea..29953ea7 100644
--- a/m4/ax_boost_program_options.m4
+++ b/m4/ax_boost_program_options.m4
@@ -29,7 +29,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 20
+#serial 22
 
 AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
 [
@@ -61,27 +61,27 @@ AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
 		LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
 		export LDFLAGS
 		AC_CACHE_CHECK([whether the Boost::Program_Options library is available],
-					   ax_cv_boost_program_options,
-					   [AC_LANG_PUSH(C++)
-				AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/program_options.hpp>
-                                                          ]],
-                                  [[boost::program_options::options_description generic("Generic options");
-                                   return 0;]])],
-                           ax_cv_boost_program_options=yes, ax_cv_boost_program_options=no)
-					AC_LANG_POP([C++])
+				ax_cv_boost_program_options,
+				[AC_LANG_PUSH(C++)
+				AC_COMPILE_IFELSE(
+					[AC_LANG_PROGRAM([[@%:@include <boost/program_options.hpp>]],
+                                			[[boost::program_options::options_description generic("Generic options");]])],
+							ax_cv_boost_program_options=yes,
+							ax_cv_boost_program_options=no)
+				AC_LANG_POP([C++])
 		])
 		if test "$ax_cv_boost_program_options" = yes; then
 				AC_DEFINE(HAVE_BOOST_PROGRAM_OPTIONS,,[define if the Boost::PROGRAM_OPTIONS library is available])
                   BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
                 if test "x$ax_boost_user_program_options_lib" = "x"; then
-                for libextension in `ls $BOOSTLIBDIR/libboost_program_options*.so* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.so.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.a*$;\1;'` ; do
+                for libextension in `ls $BOOSTLIBDIR/libboost_program_options*.so* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.so.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.dylib* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.dylib.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.a.*$;\1;'` ; do
                      ax_lib=${libextension}
 				    AC_CHECK_LIB($ax_lib, exit,
                                  [BOOST_PROGRAM_OPTIONS_LIB="-l$ax_lib"; AC_SUBST(BOOST_PROGRAM_OPTIONS_LIB) link_program_options="yes"; break],
                                  [link_program_options="no"])
 				done
                 if test "x$link_program_options" != "xyes"; then
-                for libextension in `ls $BOOSTLIBDIR/boost_program_options*.dll* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_program_options.*\)\.dll.*$;\1;'` `ls $BOOSTLIBDIR/boost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_program_options.*\)\.a*$;\1;'` ; do
+                for libextension in `ls $BOOSTLIBDIR/boost_program_options*.dll* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_program_options.*\)\.dll.*$;\1;'` `ls $BOOSTLIBDIR/boost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_program_options.*\)\.a.*$;\1;'` ; do
                      ax_lib=${libextension}
 				    AC_CHECK_LIB($ax_lib, exit,
                                  [BOOST_PROGRAM_OPTIONS_LIB="-l$ax_lib"; AC_SUBST(BOOST_PROGRAM_OPTIONS_LIB) link_program_options="yes"; break],
@@ -105,5 +105,5 @@ AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
 		CPPFLAGS="$CPPFLAGS_SAVED"
 	LDFLAGS="$LDFLAGS_SAVED"
 	fi
-	AM_CONDITIONAL(BOOST_PROGRAM_OPTIONS, test "x[$]ax_cv_boost_program_options" = xyes)
+AM_CONDITIONAL(HAVE_BOOST_PROGRAM_OPTIONS, test "$ax_cv_boost_program_options" = yes)
 ])