diff --git a/src/application/code/core/Legacies/Empire/install/mysql5/install-1.5.0.php b/src/application/code/core/Legacies/Empire/install/mysql5/install-1.5.0.php
index c4fc32e..ba30531 100644
--- a/src/application/code/core/Legacies/Empire/install/mysql5/install-1.5.0.php
+++ b/src/application/code/core/Legacies/Empire/install/mysql5/install-1.5.0.php
@@ -351,8 +351,8 @@ CREATE TABLE IF NOT EXISTS {$this->getTableName('planets')} (
     `gauss_canyon`                  DECIMAL(65,0)           NOT NULL    DEFAULT 0,
     `ionic_canyon`                  DECIMAL(65,0)           NOT NULL    DEFAULT 0,
     `buster_canyon`                 DECIMAL(65,0)           NOT NULL    DEFAULT 0,
-    `small_protection_shield`       ENUM('0','1')           NOT NULL    DEFAULT 0,
-    `big_protection_shield`         ENUM('0','1')           NOT NULL    DEFAULT 0,
+    `small_protection_shield`       ENUM('0','1')           NOT NULL    DEFAULT '0',
+    `big_protection_shield`         ENUM('0','1')           NOT NULL    DEFAULT '0',
     `interceptor_misil`             SMALLINT                NOT NULL    DEFAULT 0,
     `interplanetary_misil`          SMALLINT                NOT NULL    DEFAULT 0,
     `metal_mine_porcent`            TINYINT                 NOT NULL    DEFAULT 10,