diff --git a/tools/testing/selftests/alsa/pcm-test.c b/tools/testing/selftests/alsa/pcm-test.c
index de664dedb5418..914efcdce1ec6 100644
--- a/tools/testing/selftests/alsa/pcm-test.c
+++ b/tools/testing/selftests/alsa/pcm-test.c
@@ -383,7 +383,7 @@ static void test_pcm_time(struct pcm_data *data, enum test_class class,
 		goto __close;
 	}
 	if (rrate != rate) {
-		snprintf(msg, sizeof(msg), "rate mismatch %ld != %d", rate, rrate);
+		snprintf(msg, sizeof(msg), "rate mismatch %ld != %u", rate, rrate);
 		goto __close;
 	}
 	rperiod_size = period_size;