diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
index 45bf3f57f..51963e963 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
@@ -203,7 +203,7 @@ public class EncryptAsymmetricFragment extends Fragment {
                 userId = null;
             }
             if (userId != null && userId[0] != null) {
-                mMainUserId.setText(userId[0]);
+                mMainUserId.setText(String.format("%#16x", Long.parseLong(userId[0])));
             } else {
                 mMainUserId.setText(getResources().getString(R.string.user_id_no_name));
             }