diff --git a/src/lib/zlib/meson.build b/src/lib/zlib/meson.build
index c697e5228..d690b563d 100644
--- a/src/lib/zlib/meson.build
+++ b/src/lib/zlib/meson.build
@@ -1,4 +1,5 @@
 zlib_dep = dependency('zlib', required: get_option('zlib'))
+conf.set('ENABLE_ZLIB', zlib_dep.found())
 if not zlib_dep.found()
   subdir_done()
 endif