diff --git a/cmake/mysql_version.cmake b/cmake/mysql_version.cmake
index a05df7f5f19..c1eafd887c9 100644
--- a/cmake/mysql_version.cmake
+++ b/cmake/mysql_version.cmake
@@ -84,7 +84,11 @@ ENDIF()
 IF(NOT MYSQL_TCP_PORT)
   SET(MYSQL_TCP_PORT ${MYSQL_TCP_PORT_DEFAULT})
   SET(MYSQL_TCP_PORT_DEFAULT "0")
+ELSEIF(MYSQL_TCP_PORT EQUAL MYSQL_TCP_PORT_DEFAULT)
+  SET(MYSQL_TCP_PORT_DEFAULT "0")
 ENDIF()
+
+
 IF(NOT MYSQL_UNIX_ADDR)
   SET(MYSQL_UNIX_ADDR "/tmp/mysql.sock")
 ENDIF()