diff -r b4484bd36c22 -r fffdcac63ac3 plugins/include/cstrike.inc
--- a/plugins/include/cstrike.inc	Sun Aug 25 10:15:35 2013 -0400
+++ b/plugins/include/cstrike.inc	Sun Aug 25 11:01:55 2013 -0400
@@ -402,6 +402,8 @@
 	MarkNativeAsOptional("CS_GetClientAssists");
 	MarkNativeAsOptional("CS_SetClientAssists");
 	MarkNativeAsOptional("CS_AliasToWeaponID");
+	MarkNativeAsOptional("CS_WeaponIDToAlias");
+	MarkNativeAsOptional("CS_IsValidWeaponID");
 }
 #endif