Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r5e92cbb2c29854fb60a91dc4abafeb9b08d3272c -r577532788d2042e5299fd22aff6bae46c292002d
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 5e92cbb2c29854fb60a91dc4abafeb9b08d3272c)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 577532788d2042e5299fd22aff6bae46c292002d)
@@ -146,6 +146,7 @@
     MSG_ID_DD_ACID_DOSING_VOLUME_OVERRIDE_REQUEST,
     MSG_ID_DD_BICARB_DOSING_VOLUME_OVERRIDE_REQUEST,                                  //60
     MSG_ID_DD_GEND_EXEC_STATE_OVERRIDE_REQUEST,
+    MSG_ID_DD_HEATERS_PWM_PERIOD_OVERIDE_REQUEST,
 #ifdef __PUMPTEST__
     MSG_ID_DD_PISTON_PUMP_DATA_PUBLISH_OVERRIDE_REQUEST,
     MSG_ID_DD_PISTON_PUMP_START_STOP_OVERRIDE_REQUEST,
@@ -216,6 +217,7 @@
     &testAcidDoseVolumeOverride,
     &testBicarbDoseVolumeOverride,                                                     //60
     &testGenDExecStateOverride,
+    &testHeaterPWMPeriodOverride,
 #ifdef __PUMPTEST__
     &testDDPistonPumpControlDataPublishIntervalOverride,
     &testDDPistonPumpStartStopOverride,