diff --git a/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php b/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
index 388f63941e..2ca4d6fccc 100644
--- a/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
+++ b/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
@@ -796,6 +796,18 @@ private function diffColumns(IDatabaseTableColumn $oldColumn, IDatabaseTableColu
                 }
             }
 
+            if (isset($diff['type'])) {
+                // In MariaDB JSON is an alias for LONGTEXT COLLATE utf8mb4_bin
+                // introduced for compatibility reasons with MySQL's JSON data type.
+                if (
+                    $oldColumn->getType() === 'longtext'
+                    && $newColumn->getType() === 'json'
+                    && \stripos(WCF::getDB()->getVersion(), 'MariaDB') !== false
+                ) {
+                    unset($diff['type']);
+                }
+            }
+
             if ($diff !== []) {
                 return true;
             }
@@ -811,7 +823,7 @@ private function diffColumns(IDatabaseTableColumn $oldColumn, IDatabaseTableColu
         ) {
             \assert(
                 ($oldColumn instanceof IDefaultValueDatabaseTableColumn)
-                === ($newColumn instanceof IDefaultValueDatabaseTableColumn),
+                    === ($newColumn instanceof IDefaultValueDatabaseTableColumn),
                 "Default support must be identical, because different types have been rejected above."
             );
 
diff --git a/wcfsetup/install/files/lib/system/database/table/column/JsonDatabaseTableColumn.class.php b/wcfsetup/install/files/lib/system/database/table/column/JsonDatabaseTableColumn.class.php
new file mode 100644
index 0000000000..d31a298fcc
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/database/table/column/JsonDatabaseTableColumn.class.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace wcf\system\database\table\column;
+
+/**
+ * Represents a `json` database table column.
+ *
+ * @author      Marcel Werk
+ * @copyright   2001-2026 WoltLab GmbH
+ * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since       6.3
+ */
+final class JsonDatabaseTableColumn extends AbstractDatabaseTableColumn
+{
+    /**
+     * @inheritDoc
+     */
+    protected string $type = 'json';
+}