diff --git a/reactos/ntoskrnl/include/ntoskrnl.h b/reactos/ntoskrnl/include/ntoskrnl.h
index 4261d020544..40c03b89d1d 100644
--- a/reactos/ntoskrnl/include/ntoskrnl.h
+++ b/reactos/ntoskrnl/include/ntoskrnl.h
@@ -36,6 +36,7 @@
 #undef TEXT
 #define TEXT(s) L##s
 #include <regstr.h>
+#include <ntstrsafe.h>
 
 /* FIXME: Temporary until Winldr is used */
 #include <rosldr.h>