From 0f4ecd93abb49da1c0f54452936f73e3a8537391 Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Wed, 26 Jun 2024 08:54:26 -0500
Subject: [PATCH] Fix #1469

---
 src/core/os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/os.c b/src/core/os.c
index a7bfdb25..7fb42f4a 100644
--- a/src/core/os.c
+++ b/src/core/os.c
@@ -2668,7 +2668,7 @@ JANET_CORE_FN(os_open,
     } else if (write_flag && !read_flag) {
         open_flags |= O_WRONLY;
     } else {
-        open_flags = O_RDWR;
+        open_flags |= O_RDWR;
     }
 
     do {