diff --git a/app/src/main/java/eu/faircode/email/FixedEditText.java b/app/src/main/java/eu/faircode/email/FixedEditText.java
index 73272f9720..85d904058c 100644
--- a/app/src/main/java/eu/faircode/email/FixedEditText.java
+++ b/app/src/main/java/eu/faircode/email/FixedEditText.java
@@ -284,6 +284,7 @@ public class FixedEditText extends AppCompatEditText {
     @Override
     public ActionMode startActionMode(ActionMode.Callback callback, int type) {
         try {
+            // callback class: android.widget.Editor$TextActionModeCallback
             return super.startActionMode(callback, type);
         } catch (Throwable ex) {
             Log.e(ex);