1 files changed, 3 insertions, 0 deletions

diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index 05f01b3b097..4b45beb6901 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -1251,6 +1251,9 @@ set_local_socket ()
         if (!tmpdir)
           {
 #ifdef DARWIN_OS
+#ifndef _CS_DARWIN_USER_TEMP_DIR
+#define _CS_DARWIN_USER_TEMP_DIR 65537
+#endif
             size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0);
             if (n > 0)
               {