diff --git a/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp b/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
index 3269f2ab6b6e..9386d0eab845 100644
--- a/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
@@ -9,8 +9,12 @@
 
 // C Includes
 #include <errno.h>
+#include <pthread.h>
+#include <pthread_np.h>
+#include <stdlib.h>
 #include <sys/sysctl.h>
 #include <sys/types.h>
+#include <sys/user.h>
 
 // C++ Includes
 // Other libraries and framework includes