diff --git a/addons/project/static/src/scss/project_sharing/chatter.scss b/addons/project/static/src/scss/project_sharing/chatter.scss
index c43b6c36040..9089bc0bb73 100644
--- a/addons/project/static/src/scss/project_sharing/chatter.scss
+++ b/addons/project/static/src/scss/project_sharing/chatter.scss
@@ -26,6 +26,18 @@
             width: 45px;
             height: 45px;
         }
+
+        .o_portal_message_internal_off {
+            .btn-danger {
+                display: none;
+            }
+        }
+
+        .o_portal_message_internal_on {
+            .btn-success {
+                display: none;
+            }
+        }
     }
 
     &.o-aside {