diff --git a/CMakeLists.txt b/CMakeLists.txt
index 37405f38..06a95b8d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ if(EMSCRIPTEN)
 elseif(MSVC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /utf-8 /O2")
 else()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions -O2")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions")
 
     # disable -Wshorten-64-to-32 for apple
     if(APPLE)
@@ -36,6 +36,8 @@ else()
     # if android, use -Os
     if(ANDROID)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Os")
+    else()
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
     endif()
 endif()