diff --git a/cgminer.c b/cgminer.c
index 30cc7f91..ffc074b8 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -3077,6 +3077,7 @@ static void calc_diff(struct work *work, int known)
 {
 	struct cgminer_pool_stats *pool_stats = &(work->pool->cgminer_pool_stats);
 	double difficulty;
+	int intdiff;
 
 	if (opt_scrypt) {
 		uint64_t *data64, d64;
@@ -3103,7 +3104,8 @@ static void calc_diff(struct work *work, int known)
 	difficulty = work->work_difficulty;
 
 	pool_stats->last_diff = difficulty;
-	suffix_string((uint64_t)difficulty, work->pool->diff, sizeof(work->pool->diff), 0);
+	intdiff = round(difficulty);
+	suffix_string(intdiff, work->pool->diff, sizeof(work->pool->diff), 0);
 
 	if (difficulty == pool_stats->min_diff)
 		pool_stats->min_diff_count++;