diff --git a/admin/admin_log.php b/admin/admin_log.php
index 05b6c8ad1..a23ce806f 100644
--- a/admin/admin_log.php
+++ b/admin/admin_log.php
@@ -224,6 +224,8 @@ if ($log_rowset) {
             case $log_type['mod_topic_lock']:
             case $log_type['mod_topic_unlock']:
             case $log_type['mod_post_delete']:
+            case $log_type['mod_post_pin']:
+            case $log_type['mod_post_unpin']:
             case $log_type['mod_topic_split']:
                 // topic_title
                 if (!empty($row['log_topic_title'])) {
diff --git a/library/language/source/main.php b/library/language/source/main.php
index 106eb91b7..9ae85d699 100644
--- a/library/language/source/main.php
+++ b/library/language/source/main.php
@@ -2551,6 +2551,8 @@ $lang['LOG_ACTION']['LOG_TYPE'] = array(
     'mod_topic_unlock' => 'Topic:<br /> <b>opened</b>',
     'mod_topic_split' => 'Topic:<br /> <b>split</b>',
     'mod_post_delete' => 'Post:<br /> <b>deleted</b>',
+    'mod_post_pin' => 'Post:<br /> <b>pinned</b>',
+    'mod_post_unpin' => 'Post:<br /> <b>unpinned</b>',
     'adm_user_delete' => 'User:<br /> <b>deleted</b>',
     'adm_user_ban' => 'User:<br /> <b>ban</b>',
     'adm_user_unban' => 'User:<br /> <b>unban</b>',
diff --git a/modcp.php b/modcp.php
index 1e426a040..0ad6f6167 100644
--- a/modcp.php
+++ b/modcp.php
@@ -709,6 +709,17 @@ switch ($mode) {
 				WHERE topic_id IN($topic_csv)
 			");
 
+            // Log action
+            $type = ($pin) ? 'mod_post_pin' : 'mod_post_unpin';
+
+            foreach ($log_topics as $topic_id => $topic_title) {
+                $log_action->mod($type, array(
+                    'forum_id' => $forum_id,
+                    'topic_id' => $topic_id,
+                    'topic_title' => $topic_title,
+                ));
+            }
+
             $msg = ($pin) ? $lang['POST_PINNED'] : $lang['POST_UNPINNED'];
             bb_die(return_msg_mcp($msg));
         } elseif ($topic_id) {
@@ -739,6 +750,17 @@ switch ($mode) {
 				WHERE topic_id IN($topic_csv)
 			");
 
+            // Log action
+            $type = ($pin) ? 'mod_post_pin' : 'mod_post_unpin';
+
+            foreach ($log_topics as $topic_id => $topic_title) {
+                $log_action->mod($type, array(
+                    'forum_id' => $forum_id,
+                    'topic_id' => $topic_id,
+                    'topic_title' => $topic_title,
+                ));
+            }
+
             $msg = ($pin) ? $lang['POST_PINNED'] : $lang['POST_UNPINNED'];
             bb_die(return_msg_mcp($msg));
         }
diff --git a/src/Legacy/LogAction.php b/src/Legacy/LogAction.php
index 1dd75458f..732c942a5 100644
--- a/src/Legacy/LogAction.php
+++ b/src/Legacy/LogAction.php
@@ -21,10 +21,12 @@ class LogAction
         'mod_topic_lock' => 3,
         'mod_topic_unlock' => 4,
         'mod_post_delete' => 5,
-        'mod_topic_split' => 6,
-        'adm_user_delete' => 7,
-        'adm_user_ban' => 8,
-        'adm_user_unban' => 9,
+        'mod_post_pin' => 6,
+        'mod_post_unpin' => 7,
+        'mod_topic_split' => 8,
+        'adm_user_delete' => 9,
+        'adm_user_ban' => 10,
+        'adm_user_unban' => 11,
     ];
     public $log_type_select = [];
     public $log_disabled = false;