diff --git a/taxonomy_vocab_relate.module b/taxonomy_vocab_relate.module
index 3af71b7..c91bc58 100644
--- a/taxonomy_vocab_relate.module
+++ b/taxonomy_vocab_relate.module
@@ -36,6 +36,22 @@ function taxonomy_vocab_relate_form_alter(&$form, $form_state, $form_id) {
       $form['advanced']['relations_'. $rvid] = _taxonomy_term_select(t('Related terms in ') . $vocab_name, 'relations', array_keys(taxonomy_get_related($form['tid']['#value'])), $rvid, NULL, 1, '<'. t('none') .'>', array($edit['tid']));
       $form['advanced']['relations_'. $rvid]['#weight'] = -14;
     }
+    
+    // Find any terms from other vocabularies that are related to this one, and cache
+    // them so that they can be re-saved in taxonomy_vocab_relate_term_submit()
+    // This needs to be done because taxonomy_save_term() will delete relationships
+    // for the term whether it is stored as tid1 or tid2.
+    // Note: this only retrieves relationships from terms in different vocabularies.
+    if (empty($form['#opposing_related_terms'])) {
+      $result = db_query("SELECT tr.tid1, td.vid
+        FROM {term_relation} tr
+        LEFT JOIN {term_data} td on td.tid = tr.tid1
+        WHERE tr.tid2=%d AND td.vid != %d", $form['tid']['#value'], $vid);
+      $form['#opposing_related_terms'] = array();
+      while ($row = db_fetch_object($result)) {
+        $form['#opposing_related_terms'][] = $row->tid1;
+      }
+    }
   }
 }
 
@@ -79,6 +95,17 @@ function taxonomy_vocab_relate_term_submit(&$form, $form_state) {
       }
     }
   }
+  
+  // Re-save relationships where another term has a relationship to this one
+  // The #opposing_related_terms array is set above in taxonomy_vocab_relate_form_alter()
+  // And again, this is necessary because taxonomy_save_term() will delete the
+  // relationship regardless of which side the current term is on, and only re-save
+  // relationships 'from' the term being saved
+  if (!empty($form['#opposing_related_terms']) && is_array($form['#opposing_related_terms'])) {
+    foreach ($form['#opposing_related_terms'] as $tid1) {
+      db_query('INSERT INTO {term_relation} (tid1, tid2) VALUES (%d, %d)', $tid1, $form_state['values']['tid']);
+    }
+  }
 }
 
 /**