diff --git a/lib/ace/mouse/default_gutter_handler.js b/lib/ace/mouse/default_gutter_handler.js
index c88de596..af68cabd 100644
--- a/lib/ace/mouse/default_gutter_handler.js
+++ b/lib/ace/mouse/default_gutter_handler.js
@@ -86,7 +86,7 @@ function GutterHandler(mouseHandler) {
 
         if (tooltipAnnotation == annotation)
             return;
-        tooltipAnnotation = annotation.text.join("\n");
+        tooltipAnnotation = annotation.text.join("<br/>");
 
         tooltip.style.display = "block";
         tooltip.innerHTML = tooltipAnnotation;