diff --git a/compiler-rt/test/lsan/TestCases/many_threads_detach.cpp b/compiler-rt/test/lsan/TestCases/many_threads_detach.cpp
index 857766ddee24e..6909a483aa4ce 100644
--- a/compiler-rt/test/lsan/TestCases/many_threads_detach.cpp
+++ b/compiler-rt/test/lsan/TestCases/many_threads_detach.cpp
@@ -5,6 +5,7 @@
 
 #include <pthread.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 // Number of threads to create. This value is greater than kMaxThreads in
 // lsan_thread.cpp so that we can test that thread contexts are not being
@@ -18,8 +19,8 @@ void *null_func(void *args) {
 int main(void) {
   for (size_t i = 0; i < kTestThreads; i++) {
     pthread_t thread;
-    pthread_create(&thread, NULL, null_func, NULL);
-    pthread_detach(thread);
+    if (pthread_create(&thread, NULL, null_func, NULL) == 0)
+      pthread_detach(thread);
   }
   return 0;
 }