diff --git a/core/dap_common.c b/core/dap_common.c
index ed1d06a790e378610689e3808f1732254c8657c8..21e3bb90fb18aa8b7840a6d8144feeb2b638943f 100644
--- a/core/dap_common.c
+++ b/core/dap_common.c
@@ -1,3 +1,27 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+    DAP (Deus Applicaions Prototypes) 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.
+
+    DAP 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 any DAP based project.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifdef DAP_OS_ANDROID
 #include <android/log.h>
 #endif
diff --git a/core/dap_common.h b/core/dap_common.h
index 2b392d4ee1a9ad6db6e6486df10ef2c80238cbd8..2fa701d0bce1c4d3f4037d88c213df6c0d8fdd0a 100644
--- a/core/dap_common.h
+++ b/core/dap_common.h
@@ -1,3 +1,26 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+    DAP (Deus Applicaions Prototypes) 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.
+
+    DAP 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 any DAP based project.  If not, see <http://www.gnu.org/licenses/>.
+*/
 #pragma once
 #include <stdarg.h>
 #include <stddef.h>