diff --git a/check.go b/check.go
index 7333af2..d204aa9 100644
--- a/check.go
+++ b/check.go
@@ -31,7 +31,7 @@ type checksum struct {
 }
 
 // check is the entry point for -c operation.
-func check(args []string) chan error {
+func check(args []string, verbose bool) chan error {
 	jobs := make(chan checksum)
 
 	go func() {
@@ -55,7 +55,7 @@ func check(args []string) chan error {
 	results := []<-chan error{}
 
 	for w := 0; w < *ngo; w++ {
-		results = append(results, verify(jobs))
+		results = append(results, verify(jobs, verbose))
 	}
 
 	return merge(results)
@@ -105,7 +105,7 @@ func parseCS(line string) checksum {
 }
 
 // verify does grunt work of verifying a stream of jobs (filenames).
-func verify(jobs chan checksum) chan error {
+func verify(jobs chan checksum, verbose bool) chan error {
 	r := make(chan error)
 	go func() {
 		for job := range jobs {
@@ -125,6 +125,8 @@ func verify(jobs chan checksum) chan error {
 			f.Close()
 			if fmt.Sprintf("%x", job.hash.Sum(nil)) != job.checksum {
 				r <- fmt.Errorf("%s: bad", job.filename)
+			} else if verbose {
+				fmt.Fprintf(os.Stderr, "ok: %v\n", job.filename)
 			}
 		}
 		close(r)
diff --git a/hash.go b/hash.go
index 30a8472..252e5eb 100644
--- a/hash.go
+++ b/hash.go
@@ -32,7 +32,7 @@ func (r results) Less(i, j int) bool { return r[i].f < r[j].f }
 type hashr func() hash.Hash
 
 // hsh figures out which hash algo to use, and distributes the work of hashing
-func hsh(files []string) chan result {
+func hsh(files []string, verbose bool) chan result {
 	var h hashr
 	switch *algo {
 	case "sha1", "1":
@@ -77,7 +77,7 @@ func hsh(files []string) chan result {
 
 	res := []<-chan result{}
 	for w := 0; w < *ngo; w++ {
-		res = append(res, compute(h, jobs))
+		res = append(res, compute(h, jobs, verbose))
 	}
 
 	o := make(chan result)
@@ -96,7 +96,7 @@ func hsh(files []string) chan result {
 }
 
 // compute is the checksumming workhorse
-func compute(h hashr, jobs chan checksum) chan result {
+func compute(h hashr, jobs chan checksum, verbose bool) chan result {
 	hsh := h()
 	r := make(chan result)
 	go func() {
@@ -113,6 +113,9 @@ func compute(h hashr, jobs chan checksum) chan result {
 				r <- result{err: err}
 				continue
 			}
+			if verbose {
+				fmt.Fprintf(os.Stderr, "%v\n", job.filename)
+			}
 			r <- result{f: job.filename, cs: fmt.Sprintf("%x", hsh.Sum(nil))}
 		}
 		close(r)
diff --git a/main.go b/main.go
index d926140..e256ac0 100644
--- a/main.go
+++ b/main.go
@@ -10,6 +10,7 @@ import (
 var algo = flag.String("a", "sha256", "algorithm to use")
 var mode = flag.Bool("c", false, "check")
 var ngo = flag.Int("n", runtime.NumCPU(), "number of goroutines")
+var verbose = flag.Bool("v", false, "vebose")
 
 func main() {
 	flag.Parse()
@@ -17,7 +18,7 @@ func main() {
 	switch *mode {
 	case true:
 		ec := 0
-		for err := range check(files) {
+		for err := range check(files, *verbose) {
 			ec++
 			fmt.Fprintf(os.Stderr, "%v\n", err)
 		}
@@ -26,7 +27,7 @@ func main() {
 		}
 	case false:
 		ec := 0
-		for res := range hsh(files) {
+		for res := range hsh(files, *verbose) {
 			if res.err != nil {
 				ec++
 				fmt.Fprintf(os.Stderr, "%v\n", res.err)