diff --git a/include/hack.h b/include/hack.h
index 425094f5b..6cde43efe 100644
--- a/include/hack.h
+++ b/include/hack.h
@@ -709,9 +709,7 @@ enum nhcb_calls {
     NUM_NHCB
 };
 
-#ifdef NHUUID
 #define NHUUIDSZ 37
-#endif
 
 struct plinemsg_type {
     xint16 msgtype;  /* one of MSGTYP_foo */