diff --git a/src/common/spells/spells.c b/src/common/spells/spells.c
index 21f9d3e01..22d11ca21 100644
--- a/src/common/spells/spells.c
+++ b/src/common/spells/spells.c
@@ -59,6 +59,7 @@ extern void ct_register(const struct curse_type * ct);
 #include <util/base36.h>
 #include <util/message.h>
 #include <util/event.h>
+#include <util/functions.h>
 #include <util/rand.h>
 #include <util/variant.h>
 #include <util/goodies.h>