diff --git a/driver-avalon.h b/driver-avalon.h
index 0de31c87..a5ae754e 100644
--- a/driver-avalon.h
+++ b/driver-avalon.h
@@ -33,7 +33,7 @@
 #define AVALON_DEFAULT_TIMEOUT 0x2D
 #define AVALON_MIN_FREQUENCY 256
 #define AVALON_MAX_FREQUENCY 450
-#define AVALON_TIMEOUT_FACTOR 12000
+#define AVALON_TIMEOUT_FACTOR 12690
 #define AVALON_DEFAULT_FREQUENCY 282
 #define AVALON_DEFAULT_MINER_NUM 0x20
 #define AVALON_DEFAULT_ASIC_NUM 0xA