diff --git a/app/src/main/java/eu/faircode/email/FragmentCompose.java b/app/src/main/java/eu/faircode/email/FragmentCompose.java
index 9d8a502b31..1345e89d5d 100644
--- a/app/src/main/java/eu/faircode/email/FragmentCompose.java
+++ b/app/src/main/java/eu/faircode/email/FragmentCompose.java
@@ -3538,7 +3538,7 @@ public class FragmentCompose extends FragmentBase {
 
                 // Build message
                 ContentType ct = new ContentType("multipart/signed");
-                ct.setParameter("micalg", "sha-256");
+                ct.setParameter("micalg", micalg);
                 ct.setParameter("protocol", "application/pkcs7-signature");
                 ct.setParameter("smime-type", "signed-data");
                 String ctx = ct.toString();