diff --git a/application/migrations/115_add_webadif_api_export.php b/application/migrations/115_add_webadif_api_export.php
index cfbbcf5a..7997c83b 100644
--- a/application/migrations/115_add_webadif_api_export.php
+++ b/application/migrations/115_add_webadif_api_export.php
@@ -6,20 +6,40 @@ class Migration_add_webadif_api_export extends CI_Migration {
 
     public function up()
     {
-        $fields = array(
-            'webadifapikey varchar(50) DEFAULT NULL',
-			'webadifapiurl varchar(256) DEFAULT NULL',
-			'webadifrealtime bool DEFAULT FALSE',
-        );
-        $this->dbforge->add_column('station_profile', $fields);
+		if (!$this->db->field_exists('webadifapikey', 'station_profile')) {
+			$fields = array(
+				'webadifapikey varchar(50) DEFAULT NULL'
+			);
+			$this->dbforge->add_column('station_profile', $fields);
+		}
+		if (!$this->db->field_exists('webadifapiurl', 'station_profile')) {
+			$fields = array(
+				'webadifapiurl varchar(256) DEFAULT NULL'
+			);
+			$this->dbforge->add_column('station_profile', $fields);
+		}
+		if (!$this->db->field_exists('webadifrealtime', 'station_profile')) {
+			$fields = array(
+				'webadifrealtime bool DEFAULT FALSE'
+			);
+			$this->dbforge->add_column('station_profile', $fields);
+		}
 
-		$fields = array(
-			"webadif_upload_date datetime DEFAULT NULL",
-			"webadif_upload_status varchar(1) DEFAULT 'N'",
-		);
-		$this->dbforge->add_column($this->config->item('table_name'), $fields);
+		if (!$this->db->field_exists('webadif_upload_date', $this->config->item('table_name'))) {
+			$fields = array(
+				"webadif_upload_date datetime DEFAULT NULL"
+			);
+			$this->dbforge->add_column($this->config->item('table_name'), $fields);
+		}
 
-    }
+		if (!$this->db->field_exists('webadif_upload_status', $this->config->item('table_name'))) {
+			$fields = array(
+				"webadif_upload_status varchar(1) DEFAULT 'N'"
+			);
+			$this->dbforge->add_column($this->config->item('table_name'), $fields);
+		}
+
+	}
 
     public function down()
     {