diff --git a/addons/mass_mailing/static/src/scss/mass_mailing.scss b/addons/mass_mailing/static/src/scss/mass_mailing.scss
index 0d82fd6aaea..5614ba59572 100644
--- a/addons/mass_mailing/static/src/scss/mass_mailing.scss
+++ b/addons/mass_mailing/static/src/scss/mass_mailing.scss
@@ -77,8 +77,10 @@
             max-width: calc(100vw - 300px);
         }
     }
-    .fa-star {
-        color: $o-main-favorite-color;
+    .o_mass_mailing_subject {
+        .fa-star {
+            color: $o-main-favorite-color;
+        }
     }
 }