diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index fc5c35d759..3a95a67316 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -1182,7 +1182,7 @@ if ( !function_exists( 'get_avatar' ) ) :
  * @param string $default URL to a default image to use if no avatar is available
  * @return string <img> tag for the user's avatar
 */
-function get_avatar( $id_or_email, $size = '96', $default = '' ) {
+function get_avatar( $id_or_email, $size = '64', $default = '' ) {
 	if ( ! get_option('show_avatars') )
 		return false;