diff --git a/types/simulation/rand_util.go b/types/simulation/rand_util.go
index e5ec88fd70..9432a48d96 100644
--- a/types/simulation/rand_util.go
+++ b/types/simulation/rand_util.go
@@ -100,12 +100,12 @@ func RandTimestamp(r *rand.Rand) time.Time {
 	return time.Unix(rtime, 0)
 }
 
-// RandIntBetween returns a random int between two numbers inclusively.
+// RandIntBetween returns a random int in the range [min, max) using a given source of randomness.
 func RandIntBetween(r *rand.Rand, min, max int) int {
 	return r.Intn(max-min) + min
 }
 
-// returns random subset of the provided coins
+// RandSubsetCoins returns random subset of the provided coins
 // will return at least one coin unless coins argument is empty or malformed
 // i.e. 0 amt in coins
 func RandSubsetCoins(r *rand.Rand, coins sdk.Coins) sdk.Coins {