diff --git a/GITHUB_SHA.h b/GITHUB_SHA.h
index 0ac9c5f..f3e8efd 100644
--- a/GITHUB_SHA.h
+++ b/GITHUB_SHA.h
@@ -1 +1 @@
-#define GITHUB_SHA "devel-202304111013Z"
+#define GITHUB_SHA "devel-202304172140Z"
diff --git a/MotorDrivers.h b/MotorDrivers.h
index cc13f54..a355d26 100644
--- a/MotorDrivers.h
+++ b/MotorDrivers.h
@@ -76,9 +76,13 @@
 // analog inputs. Here we use analog inputs A2 and A3 as A0 and A1 are wired in a way so that
 // they are not useable at the same time as WiFi (what a bummer). The numbers below are the
 // actual GPIO numbers. In comments the numbers the pins have on an Uno.
-#define STANDARD_MOTOR_SHIELD F("STANDARD_MOTOR_SHIELD"),                                                 \
-    new MotorDriver(25/* 3*/, 19/*12*/, UNUSED_PIN, 13/*9*/, 35/*A2*/, 0.70, 1500, UNUSED_PIN), \
-    new MotorDriver(23/*11*/, 18/*13*/, UNUSED_PIN, 12/*8*/, 34/*A3*/, 0.70, 1500, UNUSED_PIN)
+#define STANDARD_MOTOR_SHIELD F("STANDARD_MOTOR_SHIELD"), \
+ new MotorDriver(25/* 3*/, 19/*12*/, UNUSED_PIN, 13/*9*/, 35/*A2*/, 0.70, 1500, UNUSED_PIN), \
+ new MotorDriver(23/*11*/, 18/*13*/, UNUSED_PIN, 12/*8*/, 34/*A3*/, 0.70, 1500, UNUSED_PIN)
+
+#define EX8874_SHIELD F("EX8874"),\
+ new MotorDriver(25/* 3*/, 19/*12*/, UNUSED_PIN, 13/*9*/, 35/*A2*/, 1.17, 5000, -36 /*-A4*/), \
+ new MotorDriver(23/*11*/, 18/*13*/, UNUSED_PIN, 12/*8*/, 34/*A3*/, 1.17, 5000, -39 /*-A5*/)
 
 #else
 // STANDARD shield on any Arduino Uno or Mega compatible with the original specification.
@@ -116,6 +120,10 @@
    new MotorDriver(2, 7, UNUSED_PIN,  -9, A0, 10, 2500,  6), \
    new MotorDriver(4, 8, UNUSED_PIN, -10, A1, 10, 2500, 12)
 
+#define EX8874_SHIELD F("EX8874"), \
+ new MotorDriver( 3, 12, UNUSED_PIN, 9, A0, 4.86, 5000, -A4), \
+ new MotorDriver(11, 13, UNUSED_PIN, 8, A1, 4.86, 5000, -A5)
+
 // Firebox Mk1
 #define FIREBOX_MK1 F("FIREBOX_MK1"),                                                  \
                     new MotorDriver(3, 6, 7, UNUSED_PIN, A5, 9.766, 5500, UNUSED_PIN), \
diff --git a/version.h b/version.h
index 15c6d0b..385c5f2 100644
--- a/version.h
+++ b/version.h
@@ -4,7 +4,8 @@
 #include "StringFormatter.h"
 
 
-#define VERSION "4.2.45"
+#define VERSION "4.2.46"
+// 4.2.46 - Support boards with inverted fault pin
 // 4.2.45 - Add ONCLOCKMINS to FastClock to allow hourly repeat events
 // 4.2.44 - Add PowerShell installer EX-CommandStation-installer.exe
 // 4.2.43 - Fix STM32 set right port mode bits for analog