diff --git a/web_responsive/static/src/less/main.less b/web_responsive/static/src/less/main.less
index 80f7ed48..e9a71198 100644
--- a/web_responsive/static/src/less/main.less
+++ b/web_responsive/static/src/less/main.less
@@ -106,6 +106,6 @@ main {
     }
 }
 
-.o_chat_window {
+.o_chat_window, .o_loading {
     z-index: 1000;
 }