Merge "Add missing include."
diff --git a/ext4_utils/ext4_crypt_init_extensions.cpp b/ext4_utils/ext4_crypt_init_extensions.cpp
index 7ca471a..fc54a2f 100644
--- a/ext4_utils/ext4_crypt_init_extensions.cpp
+++ b/ext4_utils/ext4_crypt_init_extensions.cpp
@@ -8,6 +8,7 @@
 #include <errno.h>
 #include <sys/mount.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include <cutils/klog.h>
 #include <cutils/properties.h>