diff --git a/lib/asn1/asn1_locl.h b/lib/asn1/asn1_locl.h
index 791c02209..7a56a4d15 100644
--- a/lib/asn1/asn1_locl.h
+++ b/lib/asn1/asn1_locl.h
@@ -13,11 +13,11 @@
 #include <limits.h>
 #include <ctype.h>
 #include <time.h>
+#include <roken.h>
 #include "gen.h"
 #include "hash.h"
 #include "symbol.h"
 
-
 void generate_type (Symbol *);
 void generate_constant (Symbol *);
 void generate_type_encode (Symbol *s);