Make sure to actually include symbols that are needed! Thanks to Usurp.
Modified: trunk/reactos/subsys/smss/smss.h

Modified: trunk/reactos/subsys/smss/smss.h
--- trunk/reactos/subsys/smss/smss.h	2005-02-20 02:30:28 UTC (rev 13662)
+++ trunk/reactos/subsys/smss/smss.h	2005-02-20 02:32:23 UTC (rev 13663)
@@ -4,6 +4,7 @@
 #define NTOS_MODE_USER
 #include <ntos.h>
 #include <sm/api.h>
+#include <sm/helper.h>
 
 #define CHILD_CSRSS     0
 #define CHILD_WINLOGON  1