diff --git a/Makefile.am b/Makefile.am
index 95bf022..d7ed138 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,6 +11,7 @@
 bin_SCRIPTS=xml-config
 
 lib_LTLIBRARIES = libxml.la
+libxml_la_LIBADD = @Z_LIBS@
 
 libxml_la_LDFLAGS = -version-info @LIBXML_VERSION_INFO@