diff -r 6bf06b1b6232 -r 32bf084df5af thermferm/server.c
--- a/thermferm/server.c	Mon Jun 26 19:27:21 2017 +0200
+++ b/thermferm/server.c	Thu Jul 06 22:31:01 2017 +0200
@@ -2292,7 +2292,7 @@
 				if (sscanf(val, "%d", &ival) == 1) {
 				    if (unit->chiller_idx != ival)
 					syslog(LOG_NOTICE, "Fermenter unit %s chiller idx %d to %d", unit->uuid, unit->chiller_idx, ival);
-				    unit->beer_idx = ival;
+				    unit->chiller_idx = ival;
 				}
 
 			    } else if (strcmp(kwd, (char *)"HEATER_ADDRESS") == 0) {