diff --git a/include/cutils/threads.h b/include/cutils/threads.h
index bb9fdb8..3133cdb 100644
--- a/include/cutils/threads.h
+++ b/include/cutils/threads.h
@@ -32,6 +32,7 @@
 #if !defined(_WIN32)
 
 #include  <pthread.h>
+#include  <sys/types.h>
 
 typedef struct {
     pthread_mutex_t   lock;
diff --git a/libcutils/threads.c b/libcutils/threads.c
index 9400441..5f5577b 100644
--- a/libcutils/threads.c
+++ b/libcutils/threads.c
@@ -21,6 +21,8 @@
 // For gettid.
 #if defined(__APPLE__)
 #include "AvailabilityMacros.h"  // For MAC_OS_X_VERSION_MAX_ALLOWED
+#include <stdint.h>
+#include <stdlib.h>
 #include <sys/syscall.h>
 #include <sys/time.h>
 #include <unistd.h>