diff --git a/app/src/amazon/java/eu/faircode/email/ApplicationSecure.java b/app/src/amazon/java/eu/faircode/email/ApplicationSecure.java
index 6a1f6b4290..82145d4d2f 100644
--- a/app/src/amazon/java/eu/faircode/email/ApplicationSecure.java
+++ b/app/src/amazon/java/eu/faircode/email/ApplicationSecure.java
@@ -1,5 +1,24 @@
 package eu.faircode.email;
 
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2021 by Marcel Bokhorst (M66B)
+*/
+
 public class ApplicationSecure extends ApplicationEx {
     public static boolean waitProviderInstalled() {
         return true;
diff --git a/app/src/fdroid/java/eu/faircode/email/ApplicationSecure.java b/app/src/fdroid/java/eu/faircode/email/ApplicationSecure.java
index 6a1f6b4290..82145d4d2f 100644
--- a/app/src/fdroid/java/eu/faircode/email/ApplicationSecure.java
+++ b/app/src/fdroid/java/eu/faircode/email/ApplicationSecure.java
@@ -1,5 +1,24 @@
 package eu.faircode.email;
 
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2021 by Marcel Bokhorst (M66B)
+*/
+
 public class ApplicationSecure extends ApplicationEx {
     public static boolean waitProviderInstalled() {
         return true;
diff --git a/app/src/play/java/eu/faircode/email/ApplicationSecure.java b/app/src/play/java/eu/faircode/email/ApplicationSecure.java
index fb24f8707e..e49e448765 100644
--- a/app/src/play/java/eu/faircode/email/ApplicationSecure.java
+++ b/app/src/play/java/eu/faircode/email/ApplicationSecure.java
@@ -1,5 +1,24 @@
 package eu.faircode.email;
 
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2021 by Marcel Bokhorst (M66B)
+*/
+
 import android.content.Intent;
 
 import com.google.android.gms.security.ProviderInstaller;