diff --git a/src/Model/BlogCategory.php b/src/Model/BlogCategory.php
index ae69c7de..78ac2647 100644
--- a/src/Model/BlogCategory.php
+++ b/src/Model/BlogCategory.php
@@ -55,6 +55,17 @@ class BlogCategory extends DataObject implements CategorisationObject
         'BlogPosts' => BlogPost::class,
     ];
 
+    public function validate() 
+    {
+        $result = parent::validate();
+
+        if(empty($this->Title)) {
+            $result->addError(_t(__CLASS__ . '.TitleNotEmpty', 'Title must not be empty'));
+        }
+
+        return $result;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/src/Model/BlogTag.php b/src/Model/BlogTag.php
index 4180f67d..f8b509dc 100644
--- a/src/Model/BlogTag.php
+++ b/src/Model/BlogTag.php
@@ -55,6 +55,17 @@ class BlogTag extends DataObject implements CategorisationObject
         'BlogPosts' => BlogPost::class
     ];
 
+    public function validate() 
+    {
+        $result = parent::validate();
+
+        if(empty($this->Title)) {
+            $result->addError(_t(__CLASS__ . '.TitleNotEmpty', 'Title must not be empty'));
+        }
+
+        return $result;
+    }
+
     /**
      * {@inheritdoc}
      */