diff --git a/ccminer.cpp b/ccminer.cpp
index 3f9e579ee..41b176df7 100644
--- a/ccminer.cpp
+++ b/ccminer.cpp
@@ -310,6 +310,7 @@ Options:\n\
 			x17         X17\n\
 			wildkeccak  Boolberry\n\
 			zr5         ZR5 (ZiftrCoin)\n\
+      --nicehash        Enable extranonce subscribe with this options.\n\
   -d, --devices         Comma separated list of CUDA devices to use.\n\
                         Device IDs start counting from 0! Alternatively takes\n\
                         string names of your cards like gtx780ti or gt640#2\n\
diff --git a/util.cpp b/util.cpp
index b80660580..dfdd2db64 100644
--- a/util.cpp
+++ b/util.cpp
@@ -217,18 +217,18 @@ void format_hashrate_unit(double hashrate, char *output, const char *unit)
 {
 	char prefix[2] = { 0, 0 };
 
-	if (hashrate < 10000) {
+	if (hashrate < 1e3) {
 		// nop
 	}
-	else if (hashrate < 1e7) {
+	else if (hashrate < 1e6) {
 		prefix[0] = 'k';
 		hashrate *= 1e-3;
 	}
-	else if (hashrate < 1e10) {
+	else if (hashrate < 1e9) {
 		prefix[0] = 'M';
 		hashrate *= 1e-6;
 	}
-	else if (hashrate < 1e13) {
+	else if (hashrate < 1e12) {
 		prefix[0] = 'G';
 		hashrate *= 1e-9;
 	}