diff --git a/tools/regression/pthread/mutex_islocked_np/Makefile b/tools/regression/pthread/mutex_isowned_np/Makefile
similarity index 72%
rename from tools/regression/pthread/mutex_islocked_np/Makefile
rename to tools/regression/pthread/mutex_isowned_np/Makefile
index 90e381d0adcf..d7d3ac47ca7a 100644
--- a/tools/regression/pthread/mutex_islocked_np/Makefile
+++ b/tools/regression/pthread/mutex_isowned_np/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-PROG=	mutex_islocked_np
+PROG=	mutex_isowned_np
 NO_MAN=
 
 LDADD=	-lpthread
diff --git a/tools/regression/pthread/mutex_islocked_np/mutex_islocked_np.c b/tools/regression/pthread/mutex_isowned_np/mutex_isowned_np.c
similarity index 83%
rename from tools/regression/pthread/mutex_islocked_np/mutex_islocked_np.c
rename to tools/regression/pthread/mutex_isowned_np/mutex_isowned_np.c
index 5ab7e330cabb..865b426c2c54 100644
--- a/tools/regression/pthread/mutex_islocked_np/mutex_islocked_np.c
+++ b/tools/regression/pthread/mutex_isowned_np/mutex_isowned_np.c
@@ -37,8 +37,8 @@ thread(void *arg)
 {
 	pthread_mutex_t *mtx = arg;
 
-	if (pthread_mutex_islocked_np(mtx) != 0) {
-		printf("pthread_mutex_islocked_np() returned non-zero\n"
+	if (pthread_mutex_isowned_np(mtx) != 0) {
+		printf("pthread_mutex_isowned_np() returned non-zero\n"
 		    "for a mutex held by another thread\n");
 		exit(1);
 	}
@@ -52,22 +52,22 @@ main(int argc, char *argv[])
 	pthread_mutex_t mtx;
 
 	pthread_mutex_init(&mtx, NULL);
-	if (pthread_mutex_islocked_np(&mtx) != 0) {
-		printf("pthread_mutex_islocked_np() returned non-zero\n"
+	if (pthread_mutex_isowned_np(&mtx) != 0) {
+		printf("pthread_mutex_isowned_np() returned non-zero\n"
 		    "for a mutex that is not held\n");
 		exit(1);
 	}
 	pthread_mutex_lock(&mtx);
-	if (pthread_mutex_islocked_np(&mtx) == 0) {
-		printf("pthread_mutex_islocked_np() returned zero\n"
+	if (pthread_mutex_isowned_np(&mtx) == 0) {
+		printf("pthread_mutex_isowned_np() returned zero\n"
 		    "for a mutex we hold ourselves\n");
 		exit(1);
 	}
 	pthread_create(&thr, NULL, thread, &mtx);
 	pthread_join(thr, NULL);
 	pthread_mutex_unlock(&mtx);
-	if (pthread_mutex_islocked_np(&mtx) != 0) {
-		printf("pthread_mutex_islocked_np() returned non-zero\n"
+	if (pthread_mutex_isowned_np(&mtx) != 0) {
+		printf("pthread_mutex_isowned_np() returned non-zero\n"
 		    "for a mutex that is not held\n");
 		exit(1);
 	}