Index: firmware/App/Controllers/Heaters.h
===================================================================
diff -u -r0bcac6885c8461b05da276fd245b580b7339ddfd -r174197d53ce0d602350536bbe15fef807ddb0a6d
--- firmware/App/Controllers/Heaters.h	(.../Heaters.h)	(revision 0bcac6885c8461b05da276fd245b580b7339ddfd)
+++ firmware/App/Controllers/Heaters.h	(.../Heaters.h)	(revision 174197d53ce0d602350536bbe15fef807ddb0a6d)
@@ -40,6 +40,7 @@
     D5_HEAT = 0,                                ///< DD primary heater
     DD_HEATERS_FIRST = D5_HEAT,                 ///< First heater
     D45_HEAT,                                   ///< DD trimmer heater
+    D108_HEAT,                                  ///< Substitution fluid heater
     NUM_OF_DD_HEATERS,                          ///< Number of the heaters
 } DD_HEATERS_T;