diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index f52f14cc566..b0b0cfdaf79 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -463,9 +463,6 @@
 /* Define to 1 if you have the <termios.h> header file. */
 #undef HAVE_TERMIOS_H
 
-/* Define to 1 if you have the <uchar.h> header file. */
-#undef HAVE_UCHAR_H
-
 /* Define to 1 if curl_global_init() is guaranteed to be thread-safe. */
 #undef HAVE_THREADSAFE_CURL_GLOBAL_INIT
 
@@ -475,6 +472,9 @@
 /* Define to 1 if your compiler understands `typeof' or something similar. */
 #undef HAVE_TYPEOF
 
+/* Define to 1 if you have the <uchar.h> header file. */
+#undef HAVE_UCHAR_H
+
 /* Define to 1 if you have the <ucred.h> header file. */
 #undef HAVE_UCRED_H