diff --git a/public/forum/post.php b/public/forum/post.php
index d60a4a39..40071f43 100644
--- a/public/forum/post.php
+++ b/public/forum/post.php
@@ -134,6 +134,10 @@ switch ($postMode) {
 
         $deletePost = forum_post_delete($postInfo['post_id']);
 
+        if ($deletePost) {
+            audit_log(MSZ_AUDIT_FORUM_POST_DELETE, $currentUserId, [$postInfo['post_id']]);
+        }
+
         if ($isXHR) {
             echo json_encode([
                 'success' => $deletePost,
@@ -182,6 +186,7 @@ switch ($postMode) {
             break;
         }
 
+        audit_log(MSZ_AUDIT_FORUM_POST_NUKE, $currentUserId, [$postInfo['post_id']]);
         http_response_code(204);
 
         if (!$isXHR) {
@@ -220,6 +225,7 @@ switch ($postMode) {
             break;
         }
 
+        audit_log(MSZ_AUDIT_FORUM_POST_RESTORE, $currentUserId, [$postInfo['post_id']]);
         http_response_code(204);
 
         if (!$isXHR) {
diff --git a/public/forum/topic.php b/public/forum/topic.php
index 06d5f150..a1acf218 100644
--- a/public/forum/topic.php
+++ b/public/forum/topic.php
@@ -169,6 +169,10 @@ if (in_array($moderationMode, $validModerationModes, true)) {
 
             $deleteTopic = forum_topic_delete($topic['topic_id']);
 
+            if ($deleteTopic) {
+                audit_log(MSZ_AUDIT_FORUM_TOPIC_DELETE, $topicUserId, [$topic['topic_id']]);
+            }
+
             if ($isXHR) {
                 echo json_encode([
                     'success' => $deleteTopic,
@@ -217,6 +221,7 @@ if (in_array($moderationMode, $validModerationModes, true)) {
                 break;
             }
 
+            audit_log(MSZ_AUDIT_FORUM_TOPIC_RESTORE, $topicUserId, [$topic['topic_id']]);
             http_response_code(204);
 
             if (!$isXHR) {
@@ -255,6 +260,7 @@ if (in_array($moderationMode, $validModerationModes, true)) {
                 break;
             }
 
+            audit_log(MSZ_AUDIT_FORUM_TOPIC_NUKE, $topicUserId, [$topic['topic_id']]);
             http_response_code(204);
 
             if (!$isXHR) {
@@ -263,24 +269,24 @@ if (in_array($moderationMode, $validModerationModes, true)) {
             break;
 
         case 'bump':
-            if ($canBumpTopic) {
-                forum_topic_bump($topic['topic_id']);
+            if ($canBumpTopic && forum_topic_bump($topic['topic_id'])) {
+                audit_log(MSZ_AUDIT_FORUM_TOPIC_BUMP, $topicUserId, [$topic['topic_id']]);
             }
 
             header('Location: /forum/topic.php?t=' . $topic['topic_id']);
             break;
 
         case 'lock':
-            if ($canLockTopic && !$topicIsLocked) {
-                forum_topic_lock($topic['topic_id']);
+            if ($canLockTopic && !$topicIsLocked && forum_topic_lock($topic['topic_id'])) {
+                audit_log(MSZ_AUDIT_FORUM_TOPIC_LOCK, $topicUserId, [$topic['topic_id']]);
             }
 
             header('Location: /forum/topic.php?t=' . $topic['topic_id']);
             break;
 
         case 'unlock':
-            if ($canLockTopic && $topicIsLocked) {
-                forum_topic_unlock($topic['topic_id']);
+            if ($canLockTopic && $topicIsLocked && forum_topic_unlock($topic['topic_id'])) {
+                audit_log(MSZ_AUDIT_FORUM_TOPIC_UNLOCK, $topicUserId, [$topic['topic_id']]);
             }
 
             header('Location: /forum/topic.php?t=' . $topic['topic_id']);
diff --git a/src/audit_log.php b/src/audit_log.php
index d7141702..ccd9f7f1 100644
--- a/src/audit_log.php
+++ b/src/audit_log.php
@@ -19,6 +19,16 @@ audit_log_define('NEWS_POST_CREATE');
 audit_log_define('NEWS_POST_EDIT');
 audit_log_define('NEWS_CATEGORY_CREATE');
 audit_log_define('NEWS_CATEGORY_EDIT');
+audit_log_define('FORUM_POST_EDIT');
+audit_log_define('FORUM_POST_DELETE');
+audit_log_define('FORUM_POST_RESTORE');
+audit_log_define('FORUM_POST_NUKE');
+audit_log_define('FORUM_TOPIC_DELETE');
+audit_log_define('FORUM_TOPIC_RESTORE');
+audit_log_define('FORUM_TOPIC_NUKE');
+audit_log_define('FORUM_TOPIC_BUMP');
+audit_log_define('FORUM_TOPIC_LOCK');
+audit_log_define('FORUM_TOPIC_UNLOCK');
 
 // replace this with a localisation system
 define('MSZ_AUDIT_LOG_STRINGS', [
@@ -42,6 +52,16 @@ define('MSZ_AUDIT_LOG_STRINGS', [
     MSZ_AUDIT_NEWS_POST_EDIT                => 'Edited news post #%d.',
     MSZ_AUDIT_NEWS_CATEGORY_CREATE          => 'Created news category #%d.',
     MSZ_AUDIT_NEWS_CATEGORY_EDIT            => 'Edited news category #%d.',
+    MSZ_AUDIT_FORUM_POST_EDIT               => 'Edited forum post #%d.',
+    MSZ_AUDIT_FORUM_POST_DELETE             => 'Deleted forum post #%d.',
+    MSZ_AUDIT_FORUM_POST_RESTORE            => 'Restored forum post #%d.',
+    MSZ_AUDIT_FORUM_POST_NUKE               => 'Nuked forum post #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_DELETE            => 'Deleted forum topic #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_RESTORE           => 'Restored forum topic #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_NUKE              => 'Nuked forum topic #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_BUMP              => 'Manually bumped forum topic #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_LOCK              => 'Locked forum topic #%d.',
+    MSZ_AUDIT_FORUM_TOPIC_UNLOCK            => 'Unlocked forum topic #%d.',
 ]);
 
 function audit_log_define(string $name): void