diff --git a/CMakeLists.txt b/CMakeLists.txt
index 306ad48..7a4f463 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -575,7 +575,10 @@ if (HAS_SDL)
     )
   endif ()
 
-  set (SDL2_DEPENDS zlib_Project)
+  set (SDL2_DEPENDS)
+  if (HAS_ZLIB)
+    set (SDL2_DEPENDS zlib_Project)
+  endif ()
   if (HAS_ALSA)
     set (SDL2_DEPENDS ${SDL2_DEPENDS} libasound_Project)
   endif ()