diff --git a/libcutils/open_memstream.c b/libcutils/open_memstream.c
index b49ef9b..5b4388a 100644
--- a/libcutils/open_memstream.c
+++ b/libcutils/open_memstream.c
@@ -46,6 +46,8 @@
  */
 #include <cutils/open_memstream.h>
 #include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>