diff --git a/core/events_inc.php b/core/events_inc.php
index 35861bb..016cdcd 100644
--- a/core/events_inc.php
+++ b/core/events_inc.php
@@ -108,6 +108,8 @@ event_declare_many( array(
 	'EVENT_BUGNOTE_EDIT_FORM' => EVENT_TYPE_EXECUTE,
 	'EVENT_BUGNOTE_EDIT' => EVENT_TYPE_EXECUTE,
 	'EVENT_BUGNOTE_DELETED' => EVENT_TYPE_EXECUTE,
+	'EVENT_TAG_ATTACHED' => EVENT_TYPE_EXECUTE,
+	'EVENT_TAG_DETACHED' => EVENT_TYPE_EXECUTE,
 
 	# Email notification events
 	'EVENT_NOTIFY_USER_INCLUDE' => EVENT_TYPE_DEFAULT,
diff --git a/tag_attach.php b/tag_attach.php
index 99a80da..028897f 100644
--- a/tag_attach.php
+++ b/tag_attach.php
@@ -126,6 +126,7 @@
 				tag_bug_attach( $t_tag_row['id'], $f_bug_id, $t_user_id );
 			}
 		}
+		event_signal( 'EVENT_TAG_ATTACHED', array( $f_bug_id ) );
 
 		form_security_purge( 'tag_attach' );
 
diff --git a/tag_detach.php b/tag_detach.php
index 5c739b8..8945701 100644
--- a/tag_detach.php
+++ b/tag_detach.php
@@ -36,6 +36,8 @@
 
 	tag_bug_detach( $f_tag_id, $f_bug_id );
 
+	event_signal( 'EVENT_TAG_DETACHED', array( $f_bug_id ) );
+
 	form_security_purge( 'tag_detach' );
 
 	print_successful_redirect_to_bug( $f_bug_id );