diff --git a/wrappers/ntdll.c b/wrappers/ntdll.c
index 5eca877..dcbee91 100644
--- a/wrappers/ntdll.c
+++ b/wrappers/ntdll.c
@@ -1,4 +1,5 @@
 #include <windows.h>
+#include <lm.h> // for NTSTATUS
 
 #include "debug.h"