Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rdc783f26994ed6eed74c8e3656fe6c9d38b9f9bd -r77f16abd083c385b3ed9cb0c41a60dff7295022c
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision dc783f26994ed6eed74c8e3656fe6c9d38b9f9bd)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 77f16abd083c385b3ed9cb0c41a60dff7295022c)
@@ -578,7 +578,8 @@
 
         if ( DD_PRIMARY_HEATER == heater )
         {
-            setFPGACPrimaryHeaterOnOffControl( (BOOL)control );
+            BOOL heaterCntrl = (BOOL)control;
+            setFPGACPrimaryHeaterOnOffControl( heaterCntrl );
         }
         else
         {