diff --git a/darkwater/DW640.cpp b/darkwater/DW640.cpp
index 08a4703..f6ff860 100644
--- a/darkwater/DW640.cpp
+++ b/darkwater/DW640.cpp
@@ -29,8 +29,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "DW640.h"
 
-using namespace DarkWater;
-
 /** PCA9685 constructor.
  * @param address I2C address
  * @see DW640_DEFAULT_ADDRESS
diff --git a/darkwater/DW640.h b/darkwater/DW640.h
index 7391a06..73ca980 100644
--- a/darkwater/DW640.h
+++ b/darkwater/DW640.h
@@ -57,6 +57,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define DW_ININ                   0
 #define DW_PHASE                  1
 
+using namespace DarkWater;
+
 class DW640 {
     public:
         DW640(uint8_t address = DW640_DEFAULT_ADDRESS);