diff --git a/src/wp-includes/js/heartbeat.js b/src/wp-includes/js/heartbeat.js
index 3e57149..3f5e64a 100644
--- a/src/wp-includes/js/heartbeat.js
+++ b/src/wp-includes/js/heartbeat.js
@@ -239,7 +239,7 @@
 
 				if ( trigger && ! hasConnectionError() ) {
 					settings.connectionError = true;
-					$(document).trigger( 'heartbeat-connection-lost', [error, status] );
+					$document.trigger( 'heartbeat-connection-lost', [error, status] );
 				}
 			}
 		}