diff --git a/include/chibi/features.h b/include/chibi/features.h
index ceae2b46..2c8b0bde 100644
--- a/include/chibi/features.h
+++ b/include/chibi/features.h
@@ -366,8 +366,12 @@
 #endif
 
 #ifndef SEXP_USE_GREEN_THREADS
+#if defined(_WIN32)
+#define SEXP_USE_GREEN_THREADS 0
+#else
 #define SEXP_USE_GREEN_THREADS ! SEXP_USE_NO_FEATURES
 #endif
+#endif
 
 #ifndef SEXP_USE_DEBUG_THREADS
 #define SEXP_USE_DEBUG_THREADS 0