diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d6269757c9..7e5aebaddb9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -645,6 +645,7 @@ endif()
 ##############################################
 
 if(MSVC)
+    set(NCNN_THREADS OFF)
     if(NCNN_OPENMP AND NCNN_SIMPLEOMP)
         # try to use /openmp in cl.exe instead -fopenmp
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /openmp")
@@ -659,7 +660,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s FORCE_FILESYSTEM=1 -s INITIAL_MEMORY=256MB -s EXIT_RUNTIME=1")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s FORCE_FILESYSTEM=1 -s INITIAL_MEMORY=256MB -s EXIT_RUNTIME=1")
     set(CMAKE_EXECUTBLE_LINKER_FLAGS "${CMAKE_EXECUTBLE_LINKER_FLAGS} -s FORCE_FILESYSTEM=1 -s INITIAL_MEMORY=256MB -s EXIT_RUNTIME=1")
-
+    
     if(NCNN_OPENMP AND NCNN_SIMPLEOMP)
         # TODO better flags for emscripten
         # node --experimental-wasm-threads xxx.js