diff --git a/src/prim/unix/prim.c b/src/prim/unix/prim.c
index 4302d996..011ffa7c 100644
--- a/src/prim/unix/prim.c
+++ b/src/prim/unix/prim.c
@@ -79,7 +79,7 @@ static int mi_prim_access(const char *fpath, int mode) {
 #elif !defined(__APPLE__)  // avoid unused warnings
 
 static int mi_prim_open(const char* fpath, int open_flags) {
-  return open(fpath,open_flags,mode);
+  return open(fpath,open_flags);
 }
 static ssize_t mi_prim_read(int fd, void* buf, size_t bufsize) {
   return read(fd,buf,bufsize);