diff --git a/lib/odslib.class.php b/lib/odslib.class.php
index 6228685a0b0..52ab06c7f12 100644
--- a/lib/odslib.class.php
+++ b/lib/odslib.class.php
@@ -104,6 +104,12 @@ class MoodleODSCell {
     public $type;
     public $format;
     public $formula;
+    /**
+     * @var array Contains the number of rows and columns spanned by the merged cell.
+     *            'rows' => integer, the number of rows the cell spans.
+     *            'columns' => integer, the number of columns the cell spans.
+     */
+    public $merge;
 }