diff --git a/admin/blocks.php b/admin/blocks.php
index b31da9ea004..f3faf4d1445 100644
--- a/admin/blocks.php
+++ b/admin/blocks.php
@@ -37,6 +37,7 @@
             print_error('blockdoesnotexist', 'error');
         }
         $DB->set_field('block', 'visible', '0', array('id'=>$block->id));      // Hide block
+        add_to_config_log('block_visibility', $block->visible, '0', $block->name);
         core_plugin_manager::reset_caches();
         admin_get_root(true, false);  // settings not required - only pages
     }
@@ -46,6 +47,7 @@
             print_error('blockdoesnotexist', 'error');
         }
         $DB->set_field('block', 'visible', '1', array('id'=>$block->id));      // Show block
+        add_to_config_log('block_visibility', $block->visible, '1', $block->name);
         core_plugin_manager::reset_caches();
         admin_get_root(true, false);  // settings not required - only pages
     }
diff --git a/lib/blocklib.php b/lib/blocklib.php
index e3a386883ea..b8b2821c858 100644
--- a/lib/blocklib.php
+++ b/lib/blocklib.php
@@ -420,6 +420,7 @@ class block_manager {
         if (!in_array($block->name, $undeletableblocktypes)) {
             $undeletableblocktypes[] = $block->name;
             set_config('undeletableblocktypes', implode(',', $undeletableblocktypes));
+            add_to_config_log('block_protect', "0", "1", $block->name);
         }
     }
 
@@ -445,6 +446,7 @@ class block_manager {
         if (in_array($block->name, $undeletableblocktypes)) {
             $undeletableblocktypes = array_diff($undeletableblocktypes, array($block->name));
             set_config('undeletableblocktypes', implode(',', $undeletableblocktypes));
+            add_to_config_log('block_protect', "1", "0", $block->name);
         }
 
     }