diff --git a/relevant_content.module b/relevant_content.module
index adf57e3..ea7a909 100644
--- a/relevant_content.module
+++ b/relevant_content.module
@@ -958,7 +958,9 @@ function relevant_content_save_block($block) {
   if (is_array($block['types'])) {
     $query = db_insert('relevant_content_blocks_types')->fields(array('id', 'type'));
     foreach ($block['types'] as $type) {
-      $query->values(array($block['id'], $type));
+      if ($type) {
+        $query->values(array($block['id'], $type));
+      }
     }
     $query->execute();
   }
@@ -967,7 +969,9 @@ function relevant_content_save_block($block) {
   if (is_array($block['vocabs'])) {
     $query = db_insert('relevant_content_blocks_vocabs')->fields(array('id', 'vid'));
     foreach ($block['vocabs'] as $vid) {
-      $query->values(array($block['id'], $vid));
+      if ($vid) {
+        $query->values(array($block['id'], $vid));
+      }
     }
     $query->execute();
   }