diff --git a/tools/tools/ath/athratestats/main.c b/tools/tools/ath/athratestats/main.c
index 8d146ca8315..815ed91bd61 100644
--- a/tools/tools/ath/athratestats/main.c
+++ b/tools/tools/ath/athratestats/main.c
@@ -115,7 +115,7 @@ static void
 ath_sample_stats(struct ath_ratestats *r, struct ath_rateioctl_rt *rt,
     struct sample_node *sn)
 {
-	uint32_t mask;
+	uint64_t mask;
 	int rix, y;
 
 	PRINTMSG("static_rix (%d) ratemask 0x%llx\n",