diff --git a/qtinterface/tqt.h.cmake b/qtinterface/tqt.h.cmake
index e42277e..f8f813e 100644
--- a/qtinterface/tqt.h.cmake
+++ b/qtinterface/tqt.h.cmake
@@ -70,6 +70,10 @@ Boston, MA 02110-1301, USA.
 #define TQ_REFCOUNT			Q_REFCOUNT
 #define TQ_TYPENAME			Q_TYPENAME
 
+#define TQ_BYTE_ORDER			Q_BYTE_ORDER
+#define TQ_LITTLE_ENDIAN		Q_LITTLE_ENDIAN
+#define TQ_BIG_ENDIAN			Q_BIG_ENDIAN
+
 #ifndef TQT_REAL_TQT
 
 #define TQWIDGETSIZE_MAX		QWIDGETSIZE_MAX