diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a59c46..7f93ec5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,7 @@
 project(Quazip)
 
+find_package(ZLIB REQUIRED)
+
 set(HEADERS
     crypt.h
     ioapi.h