diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 09a014b3853..15fe0bfff46 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -427,9 +427,6 @@
 /* Define to 1 if you have the `rl_filename_completion_function' function. */
 #undef HAVE_RL_FILENAME_COMPLETION_FUNCTION
 
-/* Define to 1 if you have the `scandir' function. */
-#undef HAVE_SCANDIR
-
 /* Define to 1 if you have the <security/pam_appl.h> header file. */
 #undef HAVE_SECURITY_PAM_APPL_H