diff --git a/addons/live_support/static/ext/static/css/livesupport.css b/addons/live_support/static/ext/static/css/livesupport.css
index 01a918c8b7f..bfe26b5e838 100644
--- a/addons/live_support/static/ext/static/css/livesupport.css
+++ b/addons/live_support/static/ext/static/css/livesupport.css
@@ -179,6 +179,7 @@
 .oe_im_chatview .oe_im_chatview_bubble_item {
     margin: 0 0 2px 30px;
     line-height: 14px;
+    word-wrap: break-word;
 }
 
 .oe_im_chatview_online {
diff --git a/addons/web_im/static/src/css/im.css b/addons/web_im/static/src/css/im.css
index 0ab7147fcdd..2f3e7dd58bb 100644
--- a/addons/web_im/static/src/css/im.css
+++ b/addons/web_im/static/src/css/im.css
@@ -247,6 +247,7 @@
 .openerp .oe_im_chatview .oe_im_chatview_bubble_item {
     margin: 0 0 2px 30px;
     line-height: 14px;
+    word-wrap: break-word;
 }
 
 .openerp .oe_im_chatview_online {