diff --git a/samples/markers/marker-example.c b/samples/markers/marker-example.c
index e787c6d16dd..05e438f8b4e 100644
--- a/samples/markers/marker-example.c
+++ b/samples/markers/marker-example.c
@@ -19,7 +19,8 @@ static int my_open(struct inode *inode, struct file *file)
 {
 	int i;
 
-	trace_mark(subsystem_event, "%d %s", 123, "example string");
+	trace_mark(subsystem_event, "integer %d string %s", 123,
+		"example string");
 	for (i = 0; i < 10; i++)
 		trace_mark(subsystem_eventb, MARK_NOARGS);
 	return -EPERM;
diff --git a/samples/markers/probe-example.c b/samples/markers/probe-example.c
index 238b2e384fc..a3679753561 100644
--- a/samples/markers/probe-example.c
+++ b/samples/markers/probe-example.c
@@ -53,7 +53,7 @@ void probe_subsystem_eventb(const struct marker *mdata, void *private,
 static struct probe_data probe_array[] =
 {
 	{	.name = "subsystem_event",
-		.format = "%d %s",
+		.format = "integer %d string %s",
 		.probe_func = probe_subsystem_event },
 	{	.name = "subsystem_eventb",
 		.format = MARK_NOARGS,