Index: remove_act.c
===================================================================
--- remove_act.c	(revision 5013)
+++ remove_act.c	(revision 5014)
@@ -30,6 +30,7 @@
 #include "action_helper.h"
 #include "set.h"
 #include "remove.h"
+#include "board.h"
 #include "funchash_core.h"
 
 /* --------------------------------------------------------------------------- */