diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index d4d23eb11e..46fd20c6ca 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-24  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac (SIM_SUBTARGET): Drop -DTARGET_TX3904=1.
+	* configure: Regenerated.
+
 2015-12-24  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-main.h (SIM_QUIET_NAN_NEGATED): Move from tconfig.h.
diff --git a/sim/mips/configure b/sim/mips/configure
index 67f7e090a5..e1a838ddbd 100755
--- a/sim/mips/configure
+++ b/sim/mips/configure
@@ -13981,7 +13981,6 @@ case "${target}" in
   mips*tx39*)
 	hw_enabled=yes
 	hw_extra_devices="tx3904cpu tx3904irc tx3904tmr tx3904sio"
-	SIM_SUBTARGET="$SIM_SUBTARGET -DTARGET_TX3904=1"
 	;;
   *)
 	;;
diff --git a/sim/mips/configure.ac b/sim/mips/configure.ac
index a64232696b..2d7bf7ceb3 100644
--- a/sim/mips/configure.ac
+++ b/sim/mips/configure.ac
@@ -444,7 +444,6 @@ case "${target}" in
   mips*tx39*)
 	hw_enabled=yes
 	hw_extra_devices="tx3904cpu tx3904irc tx3904tmr tx3904sio" 
-	SIM_SUBTARGET="$SIM_SUBTARGET -DTARGET_TX3904=1"
 	;;
   *)
 	;;