diff --git a/bin/tests/rwlock_test.c b/bin/tests/rwlock_test.c
index 073a0634c4..328b09c1e9 100644
--- a/bin/tests/rwlock_test.c
+++ b/bin/tests/rwlock_test.c
@@ -67,7 +67,7 @@ void
 main(int argc, char *argv[]) {
 	unsigned int nworkers;
 	unsigned int i;
-	isc_thread_t workers[24];
+	isc_thread_t workers[100];
 	char name[100];
 	void *dupname;
 
@@ -75,6 +75,8 @@ main(int argc, char *argv[]) {
 		nworkers = atoi(argv[1]);
 	else
 		nworkers = 2;
+	if (nworkers > 100)
+		nworkers = 100;
 	printf("%d workers\n", nworkers);
 
 	INSIST(isc_rwlock_init(&lock, 5, 10) == ISC_R_SUCCESS);