diff --git a/src/callproc.c b/src/callproc.c
index 4aa24636c35..fad81694b0a 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -1602,7 +1602,9 @@ emacs_spawn (pid_t *newpid, int std_in, int std_out, int std_err,
 
   vfork_error = pid < 0 ? errno : 0;
 
+#if USABLE_POSIX_SPAWN
  fork_done:
+#endif
   if (pid < 0)
     {
       eassert (0 < vfork_error);