diff --git a/src/ColumnType.php b/src/ColumnType.php
index 456221d..a771a51 100644
--- a/src/ColumnType.php
+++ b/src/ColumnType.php
@@ -11,4 +11,5 @@ enum ColumnType: int
     case INTEGER = 1;
     case NULL = 5;
     case TEXT = 3;
+    case UNKNOWN = 0;
 }