diff --git a/src/rofiles-fuse/main.c b/src/rofiles-fuse/main.c
index 004ad3d2..4337f00f 100644
--- a/src/rofiles-fuse/main.c
+++ b/src/rofiles-fuse/main.c
@@ -299,7 +299,7 @@ callback_truncate (const char *path, off_t size)
   path = ENSURE_RELPATH (path);
   VERIFY_WRITE(path);
 
-  fd = openat (basefd, path, O_RDWR | O_CREAT);
+  fd = openat (basefd, path, O_WRONLY);
   if (fd == -1)
     return -errno;