--- a/configure.ac
+++ b/configure.ac
@@ -43,7 +43,6 @@
 TORRENT_ENABLE_INTERRUPT_SOCKET
 
 TORRENT_ENABLE_ARCH
-TORRENT_WITH_SYSROOT
 
 dnl TORRENT_WITH_XFS
 TORRENT_WITHOUT_KQUEUE
@@ -59,8 +58,7 @@
 CC_ATTRIBUTE_VISIBILITY
 
 AX_PTHREAD
-AX_CHECK_ZLIB
-
+PKG_CHECK_MODULES([ZLIB], [zlib])
 PKG_CHECK_MODULES([CPPUNIT], [cppunit],, [no_cppunit="yes"])
 
 CFLAGS="$PTHREAD_CFLAGS $CPPUNIT_CFLAGS $CFLAGS"
--- a/src/torrent/utils/Makefile.am
+++ b/src/torrent/utils/Makefile.am
@@ -23,8 +23,9 @@
 	thread_interrupt.h \
 	uri_parser.cc \
 	uri_parser.h
+libsub_torrentutils_la_LIBADD = $(ZLIB_LIBS)
 
-AM_CPPFLAGS = -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../.. -I$(top_srcdir)
+AM_CPPFLAGS = -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../.. -I$(top_srcdir) $(ZLIB_CFLAGS)
 
 libtorrentincludedir = $(includedir)/torrent/utils
 libtorrentinclude_HEADERS = \