Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r11fcfaffab49f00f358124c8c285a821632eba24 -rc4414537261c5ad5a1ff7dcd8939dca326fe38be
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 11fcfaffab49f00f358124c8c285a821632eba24)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision c4414537261c5ad5a1ff7dcd8939dca326fe38be)
@@ -290,7 +290,7 @@
     { MSG_ID_FP_CONDUCTIVITY_SENSOR_VERSION_REQUEST,                                &testHandleConductivitySensorVersionRequest },
     { MSG_ID_DD_TEMPERATURE_SENSOR_FILTERED_TEMP_OVERRIDE_REQUEST,                  &testDDTemperatureSensorFilteredReadingsOverride },
     { MSG_ID_FP_SET_RECOVERY_VALVES_REQUEST,                                        &testIOFPSetValveRecoveryConfig },
-    { MSG_ID_DD_SUBSTITUION_PUMP_START_STOP_OVERRIDE_REQUEST,                       &testSubstitutionPumpStartStopOverride },
+    { MSG_ID_DD_SUBSTITUTION_PUMP_START_STOP_OVERRIDE_REQUEST,                      &testSubstitutionPumpStartStopOverride },
 };
 
 /// Calculation for number of entries in the incoming message function handler look-up table.