--- src/include/Makefile
+++ src/include/Makefile
@@ -24,8 +24,10 @@
 # These headers are needed by the public headers of the interfaces.
 	$(INSTALL_DATA) $(srcdir)/postgres_ext.h   $(DESTDIR)$(includedir)
 	$(INSTALL_DATA) $(srcdir)/libpq/libpq-fs.h $(DESTDIR)$(includedir)/libpq
-	$(INSTALL_DATA) pg_config.h    $(DESTDIR)$(includedir)
-	$(INSTALL_DATA) pg_config_os.h $(DESTDIR)$(includedir)
+	$(INSTALL_DATA) pg_config.h                $(DESTDIR)$(includedir)
+	$(INSTALL_DATA) pg_config_manual.h         $(DESTDIR)$(includedir)
+	$(INSTALL_DATA) pg_config_os.h             $(DESTDIR)$(includedir)
+	$(INSTALL_DATA) port.h                     $(DESTDIR)$(includedir)
 # These headers are needed by the not-so-public headers of the interfaces.
 	$(INSTALL_DATA) $(srcdir)/c.h            $(DESTDIR)$(includedir_internal)
 	$(INSTALL_DATA) $(srcdir)/postgres_fe.h  $(DESTDIR)$(includedir_internal)