diff -r 53f4887dadb4 -r d505eaedc35e src/types/BooleanDataTypeWriter.h
--- a/src/types/BooleanDataTypeWriter.h	Sat Aug 25 10:13:00 2018 +0200
+++ b/src/types/BooleanDataTypeWriter.h	Sat Aug 25 17:30:19 2018 +0200
@@ -3,14 +3,16 @@
 #include <string>
 #include <iostream>
 
+#include <relpipe/protocol/constants.h>
+
 #include "../../include/relpipe/writer/RelpipeWriterException.h"
 #include "../DataTypeWriter.h"
-#include "../format.h"
 
 namespace relpipe {
 namespace writer {
 namespace types {
 
+using namespace relpipe::protocol;
 using namespace relpipe::writer;
 
 class BooleanDataTypeWriter : public DataTypeWriter<boolean_t> {