diff --git a/src/core/components/user-avatar/user-avatar.scss b/src/core/components/user-avatar/user-avatar.scss
index e9f3b02df..6ae01b259 100644
--- a/src/core/components/user-avatar/user-avatar.scss
+++ b/src/core/components/user-avatar/user-avatar.scss
@@ -13,6 +13,11 @@
         max-width: var(--core-avatar-size);
         max-height: var(--core-avatar-size);
     }
+    img[alt] {
+        text-indent: -999999px;
+        white-space: nowrap;
+        overflow: hidden;
+    }
     img[core-external-content]:not([src]),
     img[core-external-content][src=""] {
         visibility: visible;