diff --git a/php/utils/room-icons.php b/php/utils/room-icons.php
index eef02b4..9181284 100644
--- a/php/utils/room-icons.php
+++ b/php/utils/room-icons.php
@@ -61,7 +61,7 @@
                 log_info("$room_id returned empty icon.");
             }
             // Never overwrite with an empty file.
-            if (!(file_exists($icon_cached) && empty($icon))) {
+            if (!(file_exists($icon_cached) && filesize($icon_cached) > 0 && empty($icon))) {
                 file_put_contents($icon_cached, $icon);
             }
         }