diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38b8de16..771b9946 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,7 +43,6 @@ if(EMSCRIPTEN)
     "-s USE_GLFW=3 "
     "-s USE_WEBGL2=1 "
     "-s GL_PREINITIALIZED_CONTEXT=1 "
-    "-s USE_ZLIB=1 "
     "-s USE_PTHREADS=0 "
     "-s FULL_ES2=1 "
     "-s FULL_ES3=1 "