diff --git a/src/main/java/eu/siacs/conversations/entities/Message.java b/src/main/java/eu/siacs/conversations/entities/Message.java
index d898e464537923dcb02a284b0645b138f001e260..cb235e9417873588d1353328cfcf8d1927994e2f 100644
--- a/src/main/java/eu/siacs/conversations/entities/Message.java
+++ b/src/main/java/eu/siacs/conversations/entities/Message.java
@@ -993,7 +993,7 @@ public class Message extends AbstractEntity implements AvatarService.Avatarable
                 Html.FROM_HTML_MODE_COMPACT,
                 (source) -> {
                    try {
-                       if (thumbnailer == null) return fallbackImg;
+                       if (thumbnailer == null || source == null) return fallbackImg;
                        Cid cid = BobTransfer.cid(new URI(source));
                        if (cid == null) return fallbackImg;
                        Drawable thumbnail = thumbnailer.getThumbnail(cid);