diff --git a/ASIC-README b/ASIC-README
index a56666cb..f495d29f 100644
--- a/ASIC-README
+++ b/ASIC-README
@@ -105,7 +105,7 @@ ASIC SPECIFIC COMMANDS
 --bitburner-fury-options <arg> Override avalon-options for BitBurner Fury boards baud:miners:asic:timeout:freq
 --bitburner-fury-voltage <arg> Set BitBurner Fury core voltage, in millivolts
 --bitburner-voltage <arg> Set BitBurner (Avalon) core voltage, in millivolts
---klondike-options <arg> Set klondike options clock:temp1:temp2:fan
+--klondike-options <arg> Set klondike options clock:temptarget
 
 
 AVALON AND BITBURNER DEVICES
diff --git a/README b/README
index 0a96dee1..7f327940 100644
--- a/README
+++ b/README
@@ -227,6 +227,7 @@ ASIC only options:
 --bitburner-fury-options <arg> Override avalon-options for BitBurner Fury boards baud:miners:asic:timeout:freq
 --bitburner-fury-voltage <arg> Set BitBurner Fury core voltage, in millivolts
 --bitburner-voltage <arg> Set BitBurner (Avalon) core voltage, in millivolts
+--klondike-options <arg> Set klondike options clock:temptarget
 
 See ASIC-README for more information regarding these.
 
diff --git a/cgminer.c b/cgminer.c
index f4cb7d6d..6cba29fc 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -1270,7 +1270,7 @@ static struct opt_table opt_config_table[] = {
 #ifdef USE_KLONDIKE
 	OPT_WITH_ARG("--klondike-options",
 		     set_klondike_options, NULL, NULL,
-		     "Set klondike options clock:temp1:temp2:fan"),
+		     "Set klondike options clock:temptarget"),
 #endif
 	OPT_WITHOUT_ARG("--load-balance",
 		     set_loadbalance, &pool_strategy,
diff --git a/driver-klondike.c b/driver-klondike.c
index f38314cb..54743d64 100644
--- a/driver-klondike.c
+++ b/driver-klondike.c
@@ -710,32 +710,14 @@ static bool klondike_init(struct cgpu_info *klncgpu)
 
 	// boundaries are checked by device, with valid values returned
 	if (opt_klondike_options != NULL) {
-		int hashclock, fantarget;
-		double temp1, temp2;
+		int hashclock;
+		double temptarget;
 
-		sscanf(opt_klondike_options, "%d:%lf:%lf:%d",
-						&hashclock,
-						&temp1, &temp2,
-						&fantarget);
+		sscanf(opt_klondike_options, "%d:%lf", &hashclock, &temptarget);
 		SET_HASHCLOCK(kline.cfg.hashclock, hashclock);
-		kline.cfg.temptarget = cvtCToKln(temp1);
-		kline.cfg.tempcritical = cvtCToKln(temp2);
-		if (fantarget < 0) {
-			applog(LOG_WARNING,
-				"%s%i: %s options invalid fantarget < 0 using 0",
-				klncgpu->drv->name,
-				klncgpu->device_id,
-				klncgpu->drv->dname);
-			fantarget = 0;
-		} else if (fantarget > 100) {
-			applog(LOG_WARNING,
-				"%s%i: %s options invalid fantarget > 100 using 100",
-				klncgpu->drv->name,
-				klncgpu->device_id,
-				klncgpu->drv->dname);
-			fantarget = 100;
-		}
-		kline.cfg.fantarget = (int)(255 * fantarget / 100);
+		kline.cfg.temptarget = cvtCToKln(temptarget);
+		kline.cfg.tempcritical = 0; // hard code for old firmware
+		kline.cfg.fantarget = 0xff; // hard code for old firmware
 		size = sizeof(kline.cfg) - 2;
 	}