diff --git a/cli/client/call_fn.go b/cli/client/call_fn.go
index b058eefd1..925874da2 100644
--- a/cli/client/call_fn.go
+++ b/cli/client/call_fn.go
@@ -33,7 +33,7 @@ type callID struct {
 	Error  apiErr `json:"error"`
 }
 
-func CallFN(u string, content io.Reader, output io.Writer, method string, env []string) error {
+func CallFN(u string, content io.Reader, output io.Writer, method string, env []string, displayCallID bool) error {
 	if method == "" {
 		if content == nil {
 			method = "GET"
@@ -59,7 +59,9 @@ func CallFN(u string, content io.Reader, output io.Writer, method string, env []
 	}
 	// for sync calls
 	if call_id, found := resp.Header[FN_CALL_ID]; found {
-		fmt.Fprint(output, fmt.Sprintf("Call ID: %v\n", call_id[0]))
+		if displayCallID {
+			fmt.Fprint(output, fmt.Sprintf("Call ID: %v\n", call_id[0]))
+		}
 		io.Copy(output, resp.Body)
 	} else {
 		// for async calls and error discovering
@@ -71,7 +73,9 @@ func CallFN(u string, content io.Reader, output io.Writer, method string, env []
 			// - error in body
 			// that's why we need to check values of attributes
 			if c.CallID != "" {
-				fmt.Fprint(output, fmt.Sprintf("Call ID: %v\n", c.CallID))
+				if displayCallID {
+					fmt.Fprint(output, fmt.Sprintf("Call ID: %v\n", c.CallID))
+				}
 			} else {
 				fmt.Fprint(output, fmt.Sprintf("Error: %v\n", c.Error.Message))
 			}
diff --git a/cli/routes.go b/cli/routes.go
index 9a713fb5e..8670246bf 100644
--- a/cli/routes.go
+++ b/cli/routes.go
@@ -60,6 +60,13 @@ var updateRouteFlags = append(routeFlags,
 		Usage: "defines whether skip func file or not",
 	})
 
+var callFnFlags = append(runflags(),
+	cli.BoolFlag{
+		Name:  "display-call-id",
+		Usage: "whether display call ID or not for sync calls",
+	},
+)
+
 func routes() cli.Command {
 
 	r := routesCmd{client: client.APIClient()}
@@ -73,7 +80,7 @@ func routes() cli.Command {
 				Usage:     "call a route",
 				ArgsUsage: "<app> </path> [image]",
 				Action:    r.call,
-				Flags:     runflags(),
+				Flags:     callFnFlags,
 			},
 			{
 				Name:      "list",
@@ -143,7 +150,7 @@ func call() cli.Command {
 		Name:      "call",
 		Usage:     "call a remote function",
 		ArgsUsage: "<app> </path>",
-		Flags:     runflags(),
+		Flags:     callFnFlags,
 		Action:    r.call,
 	}
 }
@@ -200,7 +207,7 @@ func (a *routesCmd) call(c *cli.Context) error {
 	u.Path = path.Join(u.Path, "r", appName, route)
 	content := stdin()
 
-	return client.CallFN(u.String(), content, os.Stdout, c.String("method"), c.StringSlice("e"))
+	return client.CallFN(u.String(), content, os.Stdout, c.String("method"), c.StringSlice("e"), c.BoolT("display-call-id"))
 }
 
 func routeWithFlags(c *cli.Context, rt *fnmodels.Route) {
diff --git a/cli/testfn.go b/cli/testfn.go
index 81105706b..e83bb0f6c 100644
--- a/cli/testfn.go
+++ b/cli/testfn.go
@@ -211,7 +211,7 @@ func runremotetest(target string, in *inputMap, expectedOut *outputMap, expected
 		os.Setenv(k, v)
 		restrictedEnv = append(restrictedEnv, k)
 	}
-	if err := client.CallFN(target, stdin, &stdout, "", restrictedEnv); err != nil {
+	if err := client.CallFN(target, stdin, &stdout, "", restrictedEnv, false); err != nil {
 		return fmt.Errorf("%v\nstdout:%s\n", err, stdout.String())
 	}