diff --git a/addons/im_chat/static/src/css/im_common.css b/addons/im_chat/static/src/css/im_common.css
index 11cbe5de19f..256deed7477 100644
--- a/addons/im_chat/static/src/css/im_common.css
+++ b/addons/im_chat/static/src/css/im_common.css
@@ -170,7 +170,7 @@
 }
 
 /* Smiley size */
-.oe_im_chatview .oe_im_chatview_message_bubble img{
+.oe_im_chatview .oe_im_chatview_bubble_item img{
     width: 18px;
 }