diff --git a/src/main/java/de/gnmyt/sqltoolkit/manager/CustomTableFieldManager.java b/src/main/java/de/gnmyt/sqltoolkit/manager/CustomTableFieldManager.java
index 6bad27d..66a6464 100644
--- a/src/main/java/de/gnmyt/sqltoolkit/manager/CustomTableFieldManager.java
+++ b/src/main/java/de/gnmyt/sqltoolkit/manager/CustomTableFieldManager.java
@@ -92,7 +92,7 @@ public class CustomTableFieldManager {
      * @return this class
      */
     public CustomTableFieldManager extras(String[] extras) {
-        field.setExtra(extras);
+        field.setExtras(extras);
         return this;
     }
 
diff --git a/src/main/java/de/gnmyt/sqltoolkit/storage/SQLTable.java b/src/main/java/de/gnmyt/sqltoolkit/storage/SQLTable.java
index 8f72f55..883d7b6 100644
--- a/src/main/java/de/gnmyt/sqltoolkit/storage/SQLTable.java
+++ b/src/main/java/de/gnmyt/sqltoolkit/storage/SQLTable.java
@@ -96,7 +96,7 @@ public abstract class SQLTable {
      * @param extras       The extras that you want to add
      */
     protected void custom(String type, String name, int length, boolean allowNull, String defaultValue, String... extras) {
-        custom(new TableField(name, type, length, allowNull, defaultValue).setExtra(extras));
+        custom(new TableField(name, type, length, allowNull, defaultValue).setExtras(extras));
     }
 
     /**