build-sys: allow compressed modules in testsuite
diff --git a/Makefile.am b/Makefile.am
index d681118..c3d7dbc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -200,7 +200,7 @@
 DISTCLEAN_LOCAL_HOOKS += testsuite-distclean
 EXTRA_DIST += testsuite/rootfs-pristine
 
-DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc --sysconfdir=/etc
+DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc --sysconfdir=/etc --with-zlib
 
 distclean-local: $(DISTCLEAN_LOCAL_HOOKS)