diff --git a/addons/web/static/src/legacy/scss/fields.scss b/addons/web/static/src/legacy/scss/fields.scss
index 4fdb2bdb5c0..6a26b7bf8de 100644
--- a/addons/web/static/src/legacy/scss/fields.scss
+++ b/addons/web/static/src/legacy/scss/fields.scss
@@ -316,6 +316,7 @@
             &.avatar.o_clickable_m2x_avatar {
                 img.o_m2m_avatar {
                     margin-right: 0px;
+                    object-fit: cover;
                 }
             }
         }