diff --git a/lldb/packages/Python/lldbsuite/test/make/thread.h b/lldb/packages/Python/lldbsuite/test/make/thread.h
--- a/lldb/packages/Python/lldbsuite/test/make/thread.h
+++ b/lldb/packages/Python/lldbsuite/test/make/thread.h
@@ -9,6 +9,8 @@
 #elif defined(__linux__)
 #include <sys/syscall.h>
 #include <unistd.h>
+#elif defined(__FreeBSD__)
+#include <pthread_np.h>
 #elif defined(__NetBSD__)
 #include <lwp.h>
 #elif defined(_WIN32)
@@ -22,6 +24,8 @@
   return tid;
 #elif defined(__linux__)
   return syscall(__NR_gettid);
+#elif defined(__FreeBSD__)
+  return static_cast<uint64_t>(pthread_getthreadid_np());
 #elif defined(__NetBSD__)
   // Technically lwpid_t is 32-bit signed integer
   return static_cast<uint64_t>(_lwp_self());