diff --git a/src/avatars/avatar.scss b/src/avatars/avatar.scss
index 553be6dba9..2abd4d5c91 100644
--- a/src/avatars/avatar.scss
+++ b/src/avatars/avatar.scss
@@ -5,6 +5,7 @@
   vertical-align: middle;
   background-color: var(--color-avatar-bg); // adds opaque bg to transparent avatars
   border-radius: $border-radius;
+  flex-shrink: 0;
   // stylelint-disable-next-line primer/box-shadow
   box-shadow: 0 0 0 1px var(--color-avatar-border);
 }