thodg/cgminer

diff --git a/driver-avalon2.c b/driver-avalon2.c
index 0da00d0..d271afe 100644
--- a/driver-avalon2.c
+++ b/driver-avalon2.c
@@ -841,8 +841,8 @@ static void avalon2_update(struct cgpu_info *avalon2)
 	memcpy(send_pkg.data + 8, &tmp, 4);
 
 	/* Configure the nonce2 offset and range */
-	range = 0xffffffff / total_devices;
-	start = range * avalon2->device_id;
+	range = 0xffffffff / (total_devices + 1);
+	start = range * (avalon2->device_id + 1);
 
 	tmp = be32toh(start);
 	memcpy(send_pkg.data + 12, &tmp, 4);
diff --git a/driver-hashratio.c b/driver-hashratio.c
index 3f4dc7f..c74324c 100644
--- a/driver-hashratio.c
+++ b/driver-hashratio.c
@@ -753,8 +753,8 @@ static void hashratio_update_work(struct cgpu_info *hashratio)
 	applog(LOG_DEBUG, "set freq: %d", info->default_freq);
 
 	/* Configure the nonce2 offset and range */
-	range = 0xffffffff / total_devices;
-	start = range * hashratio->device_id;
+	range = 0xffffffff / (total_devices + 1);
+	start = range * (hashratio->device_id + 1);
 
 	tmp = be32toh(start);
 	memcpy(send_pkg.data + 8, &tmp, 4);