diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
index 7b3a35ab3a70a12d1b708bc6322d99c27fb05974..0a84e53ca863328e2838f405e95bfb6ab8a3ed2e 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
@@ -44,6 +44,14 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
                     "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
                     "text/x-tex",
                     "text/plain");
+
+    private static final List<String> ARCHIVE_MIMES =
+            Arrays.asList(
+                    "application/x-7z-compressed",
+                    "application/zip",
+                    "application/rar",
+                    "application/x-gtar",
+                    "application/x-tar");
     public static final List<String> CODE_MIMES = Arrays.asList("text/html", "text/xml");
 
     private final ArrayList<Attachment> attachments = new ArrayList<>();
@@ -94,7 +102,7 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
             return R.drawable.ic_person_48dp;
         } else if (mime.equals("application/vnd.android.package-archive")) {
             return R.drawable.ic_adb_48dp;
-        } else if (mime.equals("application/zip") || mime.equals("application/rar")) {
+        } else if (ARCHIVE_MIMES.contains(mime)) {
             return R.drawable.ic_archive_48dp;
         } else if (mime.equals("application/epub+zip")
                 || mime.equals("application/vnd.amazon.mobi8-ebook")) {
diff --git a/src/main/java/eu/siacs/conversations/utils/MimeUtils.java b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
index ce919897ec4326df8269944a76b45e4a90e90d9a..4438e4234110ff7839e944d91528acb007801e7a 100644
--- a/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
+++ b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
@@ -141,6 +141,7 @@ public final class MimeUtils {
         add("application/vnd.sun.xml.writer.global", "sxg");
         add("application/vnd.sun.xml.writer.template", "stw");
         add("application/vnd.visio", "vsd");
+        add("application/x-7z-compressed","7z");
         add("application/x-abiword", "abw");
         add("application/x-apple-diskimage", "dmg");
         add("application/x-bcpio", "bcpio");