diff --git a/app/src/main/java/eu/faircode/email/AdapterMessage.java b/app/src/main/java/eu/faircode/email/AdapterMessage.java
index 8b32cb2895..221a7399f7 100644
--- a/app/src/main/java/eu/faircode/email/AdapterMessage.java
+++ b/app/src/main/java/eu/faircode/email/AdapterMessage.java
@@ -1370,7 +1370,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             try {
                                 String src = img.attr("src");
                                 if (src.startsWith("cid:")) {
-                                    String cid = src.substring(4);
+                                    String cid = '<' + src.substring(4) + '>';
                                     EntityAttachment attachment = DB.getInstance(context).attachment().getAttachment(id, cid);
                                     if (attachment != null && attachment.available) {
                                         InputStream is = null;