diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ca2f2ea..593511f5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -106,6 +106,9 @@ option(WITH_ZLIB "Build with ZLIB" ON)
 if(WITH_ZLIB)
   find_package("ZLIB")
   set(HAVE_ZLIB ${ZLIB_FOUND})
+  if(ZLIB_FOUND)
+    set(ZLIB_LIBRARIES_FLAGS -lz)
+  endif()
 endif()
 
 if(NOT WIN32)