diff --git a/src/Cedar/CM.c b/src/Cedar/CM.c
index 199e01bb..c0e13a1a 100644
--- a/src/Cedar/CM.c
+++ b/src/Cedar/CM.c
@@ -123,6 +123,7 @@
 
 #define	_WIN32_WINNT		0x0502
 #define	WINVER				0x0502
+#define	SECURITY_WIN32
 #include <winsock2.h>
 #include <windows.h>
 #include <Iphlpapi.h>
@@ -136,6 +137,7 @@
 #include <psapi.h>
 #include <wtsapi32.h>
 #include <Ntsecapi.h>
+#include <security.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>