diff --git a/doomsday/Include/Common/f_infine.h b/doomsday/Include/Common/f_infine.h
index 8f2c29f9de..6cf257f5f2 100644
--- a/doomsday/Include/Common/f_infine.h
+++ b/doomsday/Include/Common/f_infine.h
@@ -1,10 +1,19 @@
 #ifndef __INFINE_H__
 #define __INFINE_H__
 
+// Condition truth values (that clients can't deduce on their own).
+enum 
+{
+	FICOND_SECRET,
+	FICOND_LEAVEHUB,
+	NUM_FICONDS
+};
+
 extern boolean brief_disabled;
 
 void	FI_StartScript(char *finalescript, boolean after);
 void	FI_End(void);
+void	FI_SetCondition(int index, boolean value);
 int		FI_Briefing(int episode, int map);
 int		FI_Debriefing(int episode, int map);
 int		FI_SkipRequest(void);