diff --git a/upload/source/admincp/admincp_setting.php b/upload/source/admincp/admincp_setting.php
index 5d5bbac4b81864d7b964853d9e37298370c1aaef..667653127ebbc5af7c55adb13314f1fb1b5ab2ce 100644
--- a/upload/source/admincp/admincp_setting.php
+++ b/upload/source/admincp/admincp_setting.php
@@ -2693,7 +2693,7 @@ EOT;
 				unset($settingnew['report_reward']);
 			}
 			if($settingnew['report_reward']['min'] == $settingnew['report_reward']['max']) {
-				$settingnew['report_reward'] = array('min' => '', 'max' => '');
+				$settingnew['report_reward'] = array('min' => 0, 'max' => 0);
 			}
 			$settingnew['report_reward'] = serialize($settingnew['report_reward']);
 		}