diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8fc0d326..f04b733b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -368,11 +368,11 @@ if(NOT ZLIB_FOUND)
     set(SKIP_INSTALL_ALL ON)
     add_subdirectory(libraries/zlib EXCLUDE_FROM_ALL)
     
-    set(ZLIB_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/libraries/zlib" "${CMAKE_CURRENT_BINARY_DIR}/libraries/zlib")
+    set(ZLIB_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/libraries/zlib" "${CMAKE_CURRENT_BINARY_DIR}/libraries/zlib" CACHE STRING "")
     set_target_properties(zlibstatic PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_INCLUDE_DIR}")
     add_library(ZLIB::ZLIB ALIAS zlibstatic)
-    set(ZLIB_LIBRARY ZLIB::ZLIB)
-    set(ZLIB_FOUND true)
+    set(ZLIB_LIBRARY ZLIB::ZLIB CACHE STRING "zlib library name")
+
     find_package(ZLIB REQUIRED)
 else()
     message(STATUS "Using system zlib")