diff --git a/tests/fortify_test.cpp b/tests/fortify_test.cpp
index b131fbe..3a1bb93 100644
--- a/tests/fortify_test.cpp
+++ b/tests/fortify_test.cpp
@@ -547,6 +547,13 @@
   ASSERT_EXIT(recv(0, buf, data_len, 0), testing::KilledBySignal(SIGABRT), "");
 }
 
+TEST(DEATHTEST, FD_ISSET_fortified) {
+  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
+  fd_set set;
+  memset(&set, 0, sizeof(set));
+  ASSERT_EXIT(FD_ISSET(-1, &set), testing::KilledBySignal(SIGABRT), "");
+}
+
 extern "C" char* __strncat_chk(char*, const char*, size_t, size_t);
 extern "C" char* __strcat_chk(char*, const char*, size_t);