Index: lib/twom.c
--- lib/twom.c.orig
+++ lib/twom.c
@@ -25,6 +25,8 @@
 #include <unistd.h>
 #include <uuid/uuid.h>
 
+#define UUID_STR_LEN 36 /* from OpenBSD uuid.h */
+
 #include "twom.h"
 
 #define XXH_STATIC_LINKING_ONLY /* access advanced declarations */
