diff --git a/src/unix/fs.c b/src/unix/fs.c
index fae8f48d..896cd516 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -1234,13 +1234,22 @@ static int uv__fs_statx(int fd,
 
   rc = uv__statx(dirfd, path, flags, mode, &statxbuf);
 
-  if (rc == -1) {
+  switch (rc) {
+  case 0:
+    break;
+  case -1:
     /* EPERM happens when a seccomp filter rejects the system call.
      * Has been observed with libseccomp < 2.3.3 and docker < 18.04.
      */
     if (errno != EINVAL && errno != EPERM && errno != ENOSYS)
       return -1;
-
+    /* Fall through. */
+  default:
+    /* Normally on success, zero is returned and On error, -1 is returned.
+     * Observed on S390 RHEL running in a docker container with statx not
+     * implemented, rc might return 1 with 0 set as the error code in which
+     * case we return ENOSYS.
+     */
     no_statx = 1;
     return UV_ENOSYS;
   }