diff --git a/test_bufffer_filter_zlib/Makefile b/test_bufffer_filter_zlib/Makefile
index 11ad540..1820e0a 100644
--- a/test_bufffer_filter_zlib/Makefile
+++ b/test_bufffer_filter_zlib/Makefile
@@ -1,2 +1,2 @@
 test_bufffer_filter_zlib: test_bufffer_filter_zlib.cpp  zlib_client.cpp zlib_server.cpp
-	g++ $^ -o $@  -levent
\ No newline at end of file
+	g++ $^ -o $@  -levent -lz
\ No newline at end of file