diff --git a/Misc/NEWS b/Misc/NEWS
index 15bee70749e..28a0b580293 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,8 @@ Projected Release date: 2013-09-08
 Core and Builtins
 -----------------
 
+- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
+
 - Issue #16499: Add command line option for isolated mode.
 
 - Issue #15301: Parsing fd, uid, and gid parameters for builtins
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 5145e3a7abb..ccba5f99814 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -11567,6 +11567,10 @@ static char *have_functions[] = {
     "HAVE_FCHOWN",
 #endif
 
+#ifdef HAVE_FCHOWNAT
+    "HAVE_FCHOWNAT",
+#endif
+
 #ifdef HAVE_FEXECVE
     "HAVE_FEXECVE",
 #endif