diff --git a/PS4DecryptSaveDataKey/source/main.c b/PS4DecryptSaveDataKey/source/main.c
index b025fa8..12de83c 100644
--- a/PS4DecryptSaveDataKey/source/main.c
+++ b/PS4DecryptSaveDataKey/source/main.c
@@ -1,3 +1,4 @@
+#include "errno.h"
 #include "ps4.h"
 #include "kern.h"
 #include "kernel.h"