diff --git a/include/villas/nodes/amqp.h b/include/villas/nodes/amqp.h
index 9eb98abe2..e23154108 100644
--- a/include/villas/nodes/amqp.h
+++ b/include/villas/nodes/amqp.h
@@ -1,6 +1,4 @@
 /** Node type: amqp
- *
- * This file implements the file type for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/cbuilder.h b/include/villas/nodes/cbuilder.h
index 9afe45e9d..c90e73db1 100644
--- a/include/villas/nodes/cbuilder.h
+++ b/include/villas/nodes/cbuilder.h
@@ -2,7 +2,23 @@
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
- * @copyright 2017, Steffen Vogel
+ * @copyright 2018, Steffen Vogel
+ * @license GNU General Public License (version 3)
+ *
+ * VILLASnode
+ *
+ * This program 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
+ * any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
  *********************************************************************************/
 
 /**
diff --git a/include/villas/nodes/file.h b/include/villas/nodes/file.h
index 3e4465873..da105b0b8 100644
--- a/include/villas/nodes/file.h
+++ b/include/villas/nodes/file.h
@@ -1,6 +1,4 @@
 /** Node type: File
- *
- * This file implements the file type for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/mqtt.h b/include/villas/nodes/mqtt.h
index aadad8c29..22d12dd61 100644
--- a/include/villas/nodes/mqtt.h
+++ b/include/villas/nodes/mqtt.h
@@ -1,6 +1,4 @@
 /** Node type: mqtt
- *
- * This file implements the file type for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/nanomsg.h b/include/villas/nodes/nanomsg.h
index 9b38160dc..81feb12bf 100644
--- a/include/villas/nodes/nanomsg.h
+++ b/include/villas/nodes/nanomsg.h
@@ -1,6 +1,4 @@
 /** Node type: nanomsg
- *
- * This file implements the file type for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/opal.h b/include/villas/nodes/opal.h
index 61fc4f6db..f39668e9e 100644
--- a/include/villas/nodes/opal.h
+++ b/include/villas/nodes/opal.h
@@ -1,6 +1,4 @@
 /** Node type: OPAL (libOpalAsync API)
- *
- * This file implements the opal subtype for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/socket.h b/include/villas/nodes/socket.h
index cee715db7..345792823 100644
--- a/include/villas/nodes/socket.h
+++ b/include/villas/nodes/socket.h
@@ -1,6 +1,4 @@
 /** Node type: socket
- *
- * This file implements the socket subtype for nodes.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
diff --git a/include/villas/nodes/websocket.h b/include/villas/nodes/websocket.h
index 9ccd80af0..6c61053b1 100644
--- a/include/villas/nodes/websocket.h
+++ b/include/villas/nodes/websocket.h
@@ -1,7 +1,4 @@
 /** Node type: WebSockets
- *
- * This file implements the websocket type for nodes.
- * It's based on the libwebsockets library.
  *
  * @file
  * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>