diff --git a/cutils.h b/cutils.h
index 76cb460..7830d0a 100644
--- a/cutils.h
+++ b/cutils.h
@@ -49,7 +49,7 @@ extern "C" {
 #elif defined(_WIN32)
 #include <windows.h>
 #endif
-#if !defined(_WIN32)
+#if !defined(_WIN32) && !defined(EMSCRIPTEN) && !defined(__wasi__)
 #include <errno.h>
 #include <pthread.h>
 #endif