$OpenBSD$
--- st_wrap.c.orig	Tue Jun  5 15:32:16 2012
+++ st_wrap.c	Tue Jun  5 15:32:54 2012
@@ -227,6 +227,7 @@ extern "C" {
 #include "EXTERN.h"
 #include "perl.h"
 #include "XSUB.h"
+#include "st.h"
 
 /* Get rid of free and malloc defined by perl */
 #undef free
