diff --git a/src/lib/ebus/port.h b/src/lib/ebus/port.h
index 6591273c..80667658 100644
--- a/src/lib/ebus/port.h
+++ b/src/lib/ebus/port.h
@@ -28,10 +28,10 @@
 #include <fstream>
 #include "result.h"
 
-using namespace std;
-
 /** \file port.h */
 
+using namespace std;
+
 /** @brief available device types. */
 enum DeviceType {
 	dt_serial,  /*!< serial device */
diff --git a/src/lib/utils/appl.h b/src/lib/utils/appl.h
index 6c612eb8..6df6dc96 100644
--- a/src/lib/utils/appl.h
+++ b/src/lib/utils/appl.h
@@ -25,10 +25,10 @@
 #include <map>
 #include <vector>
 
-using namespace std;
-
 /** \file appl.h */
 
+using namespace std;
+
 /** @brief the available data types. */
 enum DataType {
 	dt_none,    /*!< default for __text_only__ */
diff --git a/src/lib/utils/logger.h b/src/lib/utils/logger.h
index b39d7fd1..125ebe39 100644
--- a/src/lib/utils/logger.h
+++ b/src/lib/utils/logger.h
@@ -28,10 +28,10 @@
 #include <vector>
 #include <cstdarg>
 
-using namespace std;
-
 /** \file logger.h */
 
+using namespace std;
+
 /** @brief available types for all subsystems */
 enum AreasType {
 	bas=0,           /*!< basis */