diff --git a/quickjs-libc.c b/quickjs-libc.c
index 40482a5..141f79f 100644
--- a/quickjs-libc.c
+++ b/quickjs-libc.c
@@ -78,6 +78,10 @@ typedef sig_t sighandler_t;
 #include "list.h"
 #include "quickjs-libc.h"
 
+#if !defined(PATH_MAX)
+#define PATH_MAX 4096
+#endif
+
 /* TODO:
    - add socket calls
 */