diff --git a/crypto/ext4crypt/Keymaster.h b/crypto/ext4crypt/Keymaster.h
index 11b3532..bd3f219 100644
--- a/crypto/ext4crypt/Keymaster.h
+++ b/crypto/ext4crypt/Keymaster.h
@@ -22,6 +22,7 @@
 #include <utility>
 
 #include <keymaster/authorization_set.h>
+#include "Utils.h"
 
 namespace android {
 namespace vold {