diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index b0cdd26eef..4fd0ff126d 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -1169,7 +1169,7 @@ function get_user_avatar($avatar, $avatar_type, $avatar_width, $avatar_height, $
 	}
 
 	$avatar_img .= $avatar;
-	return '<img src="' . $avatar_img . '" width="' . $avatar_width . '" height="' . $avatar_height . '" alt="' . ((!empty($user->lang[$alt])) ? $user->lang[$alt] : $alt) . '" />';
+	return '<img src="' . urlencode($avatar_img) . '" width="' . $avatar_width . '" height="' . $avatar_height . '" alt="' . ((!empty($user->lang[$alt])) ? $user->lang[$alt] : $alt) . '" />';
 }
 
 ?>
\ No newline at end of file