diff --git a/src/act.informative.c b/src/act.informative.c
index 44b6e43..14384da 100644
--- a/src/act.informative.c
+++ b/src/act.informative.c
@@ -27,6 +27,7 @@
 #include "fight.h"
 #include "modify.h"
 #include "asciimap.h"
+#include "quest.h"
 
 /* prototypes of local functions */
 /* do_diagnose utility functions */