diff --git a/include/mysql_version.h.in b/include/mysql_version.h.in
index f22e00dabb9..e4db942142e 100644
--- a/include/mysql_version.h.in
+++ b/include/mysql_version.h.in
@@ -17,9 +17,13 @@
 #define MYSQL_SERVER_SUFFIX_DEF		"@MYSQL_SERVER_SUFFIX@"
 #define FRM_VER				@DOT_FRM_VERSION@
 #define MYSQL_VERSION_ID		@MYSQL_VERSION_ID@
+#ifndef MYSQL_PORT
 #define MYSQL_PORT			@MYSQL_TCP_PORT@
+#endif
 #define MYSQL_PORT_DEFAULT		@MYSQL_TCP_PORT_DEFAULT@
+#ifndef MYSQL_UNIX_ADDR
 #define MYSQL_UNIX_ADDR			"@MYSQL_UNIX_ADDR@"
+#endif
 #define MYSQL_CONFIG_NAME		"my"
 #define MYSQL_COMPILATION_COMMENT	"@COMPILATION_COMMENT@"