diff --git a/app/src/main/java/eu/faircode/email/HtmlHelper.java b/app/src/main/java/eu/faircode/email/HtmlHelper.java
index 3d20d86ac6..f5bdb32f8b 100644
--- a/app/src/main/java/eu/faircode/email/HtmlHelper.java
+++ b/app/src/main/java/eu/faircode/email/HtmlHelper.java
@@ -583,7 +583,7 @@ public class HtmlHelper {
 
             if (!show_images && !TextUtils.isEmpty(alt))
                 if (TextUtils.isEmpty(tracking))
-                    img.appendText(" " + alt + " ");
+                    img.appendText("[" + alt + "]");
                 else {
                     img.append(" ");
                     Element a = document.createElement("a");