diff --git a/public-trunk/Transceiver52M/USRPDevice.cpp b/public-trunk/Transceiver52M/USRPDevice.cpp
index 4abc4b0..e20955d 100644
--- a/public-trunk/Transceiver52M/USRPDevice.cpp
+++ b/public-trunk/Transceiver52M/USRPDevice.cpp
@@ -39,6 +39,9 @@
 
 #include <Logger.h>
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 using namespace std;
 
@@ -49,7 +52,12 @@ enum dboardConfigType {
   TXB_RXB
 };
 
+#ifdef SINGLEDB
+const dboardConfigType dboardConfig = TXA_RXA;
+#else
 const dboardConfigType dboardConfig = TXA_RXB;
+#endif
+
 const double USRPDevice::masterClockRate = 52.0e6;
 
 USRPDevice::USRPDevice (double _desiredSampleRate, bool skipRx)
diff --git a/public-trunk/configure.ac b/public-trunk/configure.ac
index 6a83482..1261daf 100644
--- a/public-trunk/configure.ac
+++ b/public-trunk/configure.ac
@@ -62,6 +62,11 @@ AC_ARG_WITH(usrp1, [
         [enable USRP1 gnuradio based transceiver])
 ])
 
+AC_ARG_WITH(singledb, [
+    AS_HELP_STRING([--with-singledb],
+        [enable single daughterboard use on USRP1])
+])
+
 AC_ARG_WITH(resamp, [
     AS_HELP_STRING([--with-resamp],
         [enable resampling for non-52MHz devices])
@@ -98,6 +103,10 @@ AS_IF([test "x$with_extref" = "xyes"], [
     AC_DEFINE(EXTREF, 1, Define to 1 for external reference)
 ])
 
+AS_IF([test "x$with_singledb" = "xyes"], [
+    AC_DEFINE(SINGLEDB, 1, Define to 1 for single daughterboard)
+])
+
 AM_CONDITIONAL(RESAMPLE, [test "x$with_resamp" = "xyes"])
 AM_CONDITIONAL(UHD, [test "x$with_usrp1" != "xyes"])