diff --git a/plugins/inputs/ping/ping.go b/plugins/inputs/ping/ping.go
index e29a28c56..b6baa7d99 100644
--- a/plugins/inputs/ping/ping.go
+++ b/plugins/inputs/ping/ping.go
@@ -140,7 +140,7 @@ func (p *Ping) args(url string) []string {
 	if p.Timeout > 0 {
 		switch runtime.GOOS {
 		case "darwin":
-			args = append(args, "-W", strconv.FormatFloat(p.Timeout/1000, 'f', 1, 64))
+			args = append(args, "-W", strconv.FormatFloat(p.Timeout*1000, 'f', 1, 64))
 		case "linux":
 			args = append(args, "-W", strconv.FormatFloat(p.Timeout, 'f', 1, 64))
 		default:
diff --git a/plugins/inputs/ping/ping_test.go b/plugins/inputs/ping/ping_test.go
index 25ecdf2fa..b5d0d16e7 100644
--- a/plugins/inputs/ping/ping_test.go
+++ b/plugins/inputs/ping/ping_test.go
@@ -95,7 +95,10 @@ func TestArgs(t *testing.T) {
 	p.Timeout = 12.0
 	actual = p.args("www.google.com")
 	switch runtime.GOOS {
-	case "darwin", "freebsd":
+	case "darwin":
+		expected = []string{"-c", "2", "-n", "-s", "16", "-I", "eth0", "-W",
+			"12000.0", "www.google.com"}
+	case "freebsd":
 		expected = []string{"-c", "2", "-n", "-s", "16", "-I", "eth0", "-t",
 			"12.0", "www.google.com"}
 	default:
@@ -111,7 +114,10 @@ func TestArgs(t *testing.T) {
 	p.PingInterval = 1.2
 	actual = p.args("www.google.com")
 	switch runtime.GOOS {
-	case "darwin", "freebsd":
+	case "darwin":
+		expected = []string{"-c", "2", "-n", "-s", "16", "-I", "eth0", "-W",
+			"12000.0", "-i", "1.2", "www.google.com"}
+	case "freebsd":
 		expected = []string{"-c", "2", "-n", "-s", "16", "-I", "eth0", "-t",
 			"12.0", "-i", "1.2", "www.google.com"}
 	default: