From 9261e0802bd00b7df0bbfda77e9af0f60f82550f Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Thu, 20 Aug 2020 20:11:53 +0200
Subject: [PATCH] Prevent crash

---
 app/src/main/java/eu/faircode/email/MessageHelper.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/faircode/email/MessageHelper.java b/app/src/main/java/eu/faircode/email/MessageHelper.java
index 9458d8cebe..96bea63387 100644
--- a/app/src/main/java/eu/faircode/email/MessageHelper.java
+++ b/app/src/main/java/eu/faircode/email/MessageHelper.java
@@ -338,7 +338,8 @@ public class MessageHelper {
 
                         // Build message
                         ContentType ct = new ContentType("multipart/signed");
-                        ct.setParameter("micalg", micalg);
+                        if (micalg != null)
+                            ct.setParameter("micalg", micalg);
                         ct.setParameter("protocol", "application/pgp-signature");
                         String ctx = ct.toString();
                         int slash = ctx.indexOf("/");